Pertussis is a bacterial infection of the airways that causes severe coughing fits and is also called whooping cough. The early symptoms of pertussis often look like a common cold, but the cough can last for weeks and may lead to vomiting, trouble catching breath, or the classic “whoop” sound after coughing. It can affect any age group, but babies are at the highest risk of serious illness, hospital care, and death. Not everyone will have the same experience. Pertussis is usually treated with antibiotics, and many people also need rest, fluids, and close monitoring, especially infants and anyone with breathing problems.
How many people live with Pertussis?
Pertussis, also called whooping cough, is usually a short-term infection, so health agencies count yearly cases rather than how many people are living with it at one time. Worldwide, around 100,000 to 200,000 cases have been reported in recent years, depending on how completely countries report them (World Health Organization, 2024), and about 35,000 cases were reported in the United States in 2024 (Centers for Disease Control and Prevention, 2025).
Overview
PertussisSymptoms
Pertussis often starts like a cold, with a runny nose, fever, and cough. After 1 to 2 weeks, coughing fits can become severe, sometimes causing vomiting or a whoop when breathing in. Early symptoms of pertussis are easy to miss.
Outlook and prognosis
With pertussis, most older children and adults recover fully, though the cough can linger for weeks or even months. Babies, especially those under 6 months, face the highest risk of breathing problems, hospital care, and rarely, life-threatening complications.
Causes and risk factors
Pertussis is caused by Bordetella pertussis bacteria spread through coughs and sneezes. Risk is highest with no vaccination, close household or daycare exposure, crowded indoor settings, and in babies, pregnant people, and those with weakened immune systems.
Genetic influences
Genetics are usually not a major factor in whether someone gets pertussis. Small differences in immune-related genes may affect risk or severity, while genetic variations in the pertussis bacteria can influence spread and, at times, vaccine protection.
Diagnosis
Pertussis is diagnosed based on your symptoms, especially a long-lasting cough with coughing fits or a whoop, plus your exposure history. Doctors often confirm it with a nose or throat swab tested for the bacteria.
Treatment and drugs
Pertussis is usually treated with antibiotics, which work best early and can help reduce spread to others. Many living with pertussis also need rest, fluids, and sometimes hospital care if breathing, feeding, or dehydration become concerns.
Symptoms
At first, pertussis often feels like a lingering cold, with a runny nose, mild fever, and a light cough that does not seem alarming. The changes are often subtle at first, blending into daily life until they become more noticeable. After a week or two, many people with pertussis develop severe coughing spells, which are a key part of the early symptoms of pertussis. Babies may look different from older children or adults and can have pauses in breathing instead of the classic cough.
In the first stage, pertussis can cause a runny or stuffy nose, sneezing, and watery eyes. These symptoms are often mild, so it can be easy to miss what is starting.
A low fever can happen early, but many people do not feel very sick at first. Because the fever is usually small or absent, pertussis may seem less serious than it is.
The cough often begins as a simple, irritating cough and then worsens over days. It may start off sounding like a common viral illness before turning into repeated coughing spells.
As pertussis progresses, coughing can come in hard bursts that are difficult to stop. These fits may leave someone bent over, red-faced, or struggling to catch a full breath.
How people usually first notice Pertussis?
Pertussis often starts quietly, looking a lot like an ordinary cold: a runny nose, mild fever, watery eyes, and a cough that seems minor at first. Over days to 1 to 2 weeks, the first signs of pertussis usually become clearer when the cough turns into sudden, hard coughing fits, sometimes followed by vomiting, exhaustion, or a high-pitched “whoop” sound when breathing in, although not everyone makes that sound. In babies, how pertussis is first noticed can be different, with pauses in breathing, poor feeding, or turning blue rather than a classic cough, which is why early medical attention matters.
Types of Pertussis
Pertussis often feels different from one phase to the next, so the main types of pertussis people hear about are really stages of illness rather than separate diseases. It can start like an ordinary cold, then shift into severe coughing fits, and later improve slowly over weeks. Doctors sometimes classify symptoms as early, peak, and recovery phases. Symptoms don’t always look the same for everyone.
Early stage
This first phase often brings a runny nose, mild cough, sneezing, and sometimes a low fever, so it can look like a common cold at first. Many living with pertussis are most contagious during this stage, even though the illness may not seem serious yet. In babies, warning signs can be subtle and may include pauses in breathing instead of much coughing.
Paroxysmal stage
This is the peak phase, marked by repeated coughing fits that can be hard to stop once they start. Some may vomit after coughing, feel exhausted, or make a high-pitched whooping sound when breathing in, although many teens and adults do not whoop. Coughing spells are often worse at night and can make eating, drinking, or sleeping difficult.
Recovery stage
In this phase, coughing usually becomes less frequent and less severe, but it can take weeks to fully settle down. The balance of symptoms can shift over time. Even as people with pertussis start feeling better, another cold or irritation in the air can trigger the cough again for a while.
Can I slow down the onset of symptoms?
No, there is no good evidence that lifestyle steps like diet, exercise, sleep, or supplements can meaningfully delay the start of pertussis, also called whooping cough, once you have been exposed or infected. The main proven step is staying up to date on vaccination, which can reduce the chance of getting it and may make illness less severe, and if you have had close contact with someone who has pertussis, a doctor may recommend early preventive antibiotics in some situations, especially for babies, pregnant people, and others at high risk. These steps cannot guarantee prevention, but getting medical advice early can still help protect you and the people around you.
What genetics can tell you about symptoms
For pertussis, genetics usually cannot tell doctors exactly which symptoms someone will have, how severe the coughing spells will be, or when they will start. A few studies suggest that small differences in immune-related genes may slightly affect how strongly someone responds to the infection, but these effects are not reliable enough to predict symptoms in everyday care. In practice, age, vaccination status, and overall health matter much more than genetics for how pertussis shows up.
Causes and risk factors
Pertussis usually spreads when someone nearby coughs or sneezes, so living with or caring for an infected person is the main risk. Knowing the risks can help you feel more in control. Babies, pregnant people, older adults, and people with weak immune systems can get sick more easily, and infants have the highest risk of severe pertussis. Being unvaccinated, missing booster shots, crowded indoor contact, and smoke exposure can all raise the chance of catching pertussis. Genes are not a common cause of pertussis, but rare inherited immune problems may make it harder for the body to fight this infection.
What are the most common causes or risk factors?
Pertussis, also called whooping cough, is caused by a bacterial infection that spreads through the air when an infected person coughs or sneezes. The biggest risk factors are not being vaccinated, having vaccine protection fade over time, and being a baby who is too young to have full protection yet. Risk is also higher with close contact, such as living with someone who has it or spending time in crowded indoor places, and it is not usually linked to inherited genes.
Environmental and biological risk factors
Pertussis is a very contagious airway infection, so risk usually rises with repeated close exposure to someone who is coughing. Doctors often group risks into internal (biological) and external (environmental). The main risk factors for pertussis infection include age, how much immune protection someone has, and whether they spend time in places where the bacteria can spread easily.
Living with someone who has pertussis is one of the strongest risk factors, especially if the cough has just started and the infection has not been recognized yet. Spread is more likely when people share bedrooms, meals, or long periods of close indoor contact.
Daycare centers, schools, dorms, shelters, and similar shared spaces make it easier for coughing droplets to move from one person to another. Risk rises when ventilation is poor and many people spend hours together indoors.
Babies younger than 12 months have the least built-up protection, because their early vaccine doses are still being given over time. This makes pertussis more likely after exposure, especially in the first months of life.
Protection from past vaccination or an earlier infection fades over the years. That is why pertussis can affect teens and adults again, even if they were protected when younger.
Genetic risk factors
Pertussis is not usually an inherited disease, because it is caused by a bacterial infection rather than a single faulty gene. Still, genetic differences can shape how strongly the immune system responds, so some people may be more likely to get infected or become more severely ill. Carrying a genetic change doesn’t guarantee the condition will appear. In practice, the clearest genetic risk factors for pertussis are rare inherited immune system disorders, while common gene differences seem to have smaller effects.
Not inherited: Pertussis is caused by infection with bacteria, so there is no single gene that directly causes it. Inherited traits matter more by affecting how well the body recognizes and clears the infection.
Primary immunodeficiency: Rare inherited immune disorders can make it harder to fight the bacteria that cause pertussis. Many living with these conditions may have a higher risk of severe illness or complications.
Antibody disorders: Some inherited conditions reduce the body’s ability to make strong, lasting antibodies against infections. When that happens, protection against pertussis can be weaker and illness may be harder to control.
Immune signaling genes: Common inherited differences in genes that control early immune alarms and inflammation may slightly change how the body responds to pertussis. These changes do not cause pertussis by themselves, but they may influence susceptibility or severity.
HLA genes: HLA genes help the immune system show pieces of germs to infection-fighting cells. Differences in these genes may affect how strongly someone’s immune system reacts to pertussis, although they are not used alone to predict risk.
Lifestyle risk factors
Pertussis is an infection, so lifestyle habits do not create the bacteria itself, but they can change how easily a person catches it, spreads it, or recovers. The main lifestyle risk factors for pertussis are behaviors that reduce immune protection, increase close-contact exposure, or irritate the airways. Understanding how lifestyle affects pertussis can help lower the chance of severe coughing illness and transmission to others.
Not keeping up with pertussis vaccination and booster schedules lowers protection against infection. This increases the chance of getting pertussis and passing it to infants, pregnant people, or other vulnerable contacts.
Smoking and regular exposure to secondhand smoke irritate the airways and impair normal mucus clearance. This can make pertussis coughing more severe and may prolong recovery.
Frequent close contact with people who are coughing, especially in crowded social settings, raises the chance of catching pertussis. Going to work, school, or gatherings while symptomatic also increases spread to others.
Waiting too long to seek care for a persistent or worsening cough can delay diagnosis and treatment. This can extend the period of contagiousness and increase the risk of complications from severe coughing.
Risk prevention
Pertussis, also called whooping cough, spreads easily through the air when someone coughs or sneezes, so prevention centers on lowering exposure and keeping protection up to date. Vaccination is the most effective way to reduce the risk of getting pertussis and to make illness less severe if it happens. Prevention can mean both medical steps, like vaccines, and lifestyle steps, like avoiding close contact with people who have a bad cough. This matters especially for babies, pregnant people, and anyone around newborns.
Keeping up with the recommended pertussis vaccine schedule is the best way to lower your risk. Protection can fade over time, so older children, teens, adults, and pregnant people may need booster doses.
A pertussis vaccine during each pregnancy helps pass short-term protection to the baby before birth. This is one of the most important ways to prevent severe pertussis in the first months of life.
People who live with or care for a young baby should make sure their pertussis vaccines are current. This reduces the chance of bringing whooping cough into the home, where early symptoms of pertussis can look like an ordinary cold at first.
Try to limit close contact with anyone who has a persistent cough, especially around infants or during local outbreaks. If you are sick, staying home and keeping some distance can help prevent spread.
Can you prevent Pertussis?
You cannot prevent pertussis, also called whooping cough, with complete certainty, but you can lower the risk a lot. Staying up to date on whooping cough vaccines is the best-known way to help prevent it, and getting vaccinated during each pregnancy helps protect newborns in their first weeks of life. It also helps to avoid close contact with people who are coughing, and after a close exposure, some people may be offered antibiotics to lower the chance of getting sick or passing it on.
Transmission
Pertussis, also called whooping cough, spreads from person to person through tiny droplets released into the air when someone coughs, sneezes, or talks at close range. Many living with pertussis are most likely to pass it on early in the illness, when it can look like an ordinary cold, which is one reason how pertussis spreads can be hard to notice at first.
Pertussis is very contagious, especially for people in the same home, classroom, or childcare setting who spend hours nearby. Without treatment, someone can often spread it for about 2 weeks after the cough begins, but after 5 full days of the right antibiotics they are usually no longer considered contagious.
When to test your genes
For pertussis, genetic testing is not part of early detection or routine care. If someone has unusually severe, repeated, or hard-to-explain infections, doctors may consider genetic testing for an underlying immune system condition instead. For most people, timely vaccination and prompt testing for the infection itself matter far more.
Diagnosis
Pertussis is usually diagnosed from the pattern of symptoms, especially a cough that comes in hard bursts, causes a whooping sound, or leads to vomiting after coughing. Early symptoms can look like a common cold, so the diagnosis of pertussis is often easier once the cough has lasted for days or weeks. It’s natural to worry when symptoms don’t have a clear explanation.
Doctors ask when the cough started, how it has changed, and whether there are coughing fits, vomiting after coughing, or trouble catching a breath. This history is one of the most important parts of how pertussis is diagnosed, especially in the first few weeks.
Your clinician will often ask whether you have been around someone with a long-lasting cough or a known pertussis infection. Vaccine history also helps, since pertussis can still happen after vaccination but may be milder.
During the exam, the doctor listens to the lungs, checks breathing effort, and looks for signs of dehydration or low oxygen. In babies, the exam may focus closely on pauses in breathing, poor feeding, or unusual tiredness.
A swab from the back of the nose is commonly used for PCR testing, which looks for genetic material from the bacteria that cause pertussis. A culture may also be done, although it takes longer and is most helpful early in the illness.
How is Pertussis diagnosed?
Pertussis, also called whooping cough, is usually diagnosed from the pattern of symptoms, especially a cough that comes in hard spells, the timing of the illness, and whether there has been contact with someone who may have had it. To confirm it, a doctor often takes a swab from the nose or throat to look for the bacteria that cause pertussis, and this works best early in the illness. In some cases, blood tests may also help, especially if the cough has been going on for a while.
Stages of Pertussis
Pertussis often develops in a fairly typical pattern over time, although not everyone moves through it in exactly the same way. Early and accurate diagnosis helps you plan ahead with confidence. In many people, the stages of pertussis begin with what seems like an ordinary cold, then shift into severe coughing fits before slowly easing. Babies, teens, and adults may experience these stages differently, and young infants can become seriously ill very quickly.
Catarrhal stage
This early stage usually lasts about 1 to 2 weeks and often looks like a common cold. You may notice a runny nose, mild fever, tiredness, and the early symptoms of pertussis, such as a light cough that gradually worsens. Because it seems mild at first, pertussis is often hardest to recognize at this point.
Paroxysmal stage
This stage brings repeated coughing fits that can be intense and exhausting, often lasting 1 to 6 weeks and sometimes longer. Some people make a high-pitched whooping sound when breathing in after a fit, while others vomit, feel short of breath, or struggle to catch their breath. Babies with pertussis may not whoop at all and can instead pause their breathing or turn blue.
Convalescent stage
Recovery is usually gradual, with coughing spells becoming less frequent and less severe over weeks to months. Many living with pertussis still find that exercise, cold air, or another viral infection can trigger coughing for a while. Even when the worst phase has passed, the body often needs time to fully settle.
Outlook and prognosis
With prompt diagnosis and appropriate antibiotics, most people with pertussis recover fully, but the cough can linger for weeks to months, which is why it is often described as the long recovery from whooping cough. Prognosis is generally best in older children, adolescents, and adults, though fatigue, sleep disruption, rib pain, vomiting, and weight loss can persist during recovery. The highest risk of severe disease is in young infants, especially those too young to be fully vaccinated, because pertussis can cause apnea, pneumonia, seizures, encephalopathy, and dehydration. Deaths are uncommon overall in countries with good access to vaccination and intensive care, but mortality remains concentrated in infants under 6 months of age and can be significant during outbreaks or in low-resource settings. Vaccination, maternal immunization during pregnancy, and early treatment of cases and close contacts substantially improve outcomes and reduce complications. People with underlying lung disease, immunocompromise, or delayed diagnosis may also have a more complicated course, but most survivors do not have lasting long-term damage.
Long-term effects
For many people, the biggest lasting issue with pertussis is that the cough can drag on for weeks or even months, making work, school, sleep, and daily routines harder than usual. Long-term effects vary widely, with most older children and adults recovering fully, while babies and people who become severely ill face a higher risk of serious complications. In the long-term effects of pertussis, age and how severe the infection became often matter more than the first few days of symptoms alone.
Pertussis often leaves a severe cough that continues long after the infection itself has started to clear. Some may find that laughing, exercise, cold air, or lying flat can trigger coughing fits for weeks or months.
Repeated coughing spells can break up sleep and leave people feeling worn down during the day. For many, this can mean trouble concentrating, slower recovery, and a gradual return to normal energy.
Hard coughing can cause sore ribs, muscle pain, vomiting, or sometimes even a cracked rib, especially in adults. These problems usually improve with recovery, but they can make the illness feel much longer and harder to shake.
In babies and in people with severe pertussis, pneumonia or episodes of not breathing normally can lead to a more serious course. When oxygen levels drop or the lungs are badly affected, recovery may take longer and lasting health problems become more likely.
How is it to live with Pertussis?
Living with pertussis can feel exhausting and disruptive, because the coughing fits are often intense, hard to control, and may leave people drained, sore, or short of breath between episodes. Daily life can shrink quickly; sleep is often interrupted, talking and eating may trigger more coughing, and work, school, exercise, and social plans may need to pause for days to weeks. It also affects the people around you, since pertussis spreads easily through close contact, which means families may need to avoid visitors, protect infants and other high-risk loved ones, and sometimes seek preventive treatment after exposure. With medical care, rest, and steps to limit spread, most people do improve, but the recovery can be slower than many expect.
Treatment and drugs
Pertussis is treated mainly with antibiotics, especially when they are started early, because they can shorten how long you are contagious and may lessen symptoms if given in the first stage of illness. The main treatment for pertussis in adults and children usually includes an antibiotic such as azithromycin, along with rest, fluids, and close monitoring of breathing and feeding. For many people, treatment begins with small daily steps. Babies, pregnant people near delivery, and anyone with severe coughing spells or breathing trouble may need hospital care, where doctors can give oxygen, suction mucus, and support feeding if needed. Because coughing can last for weeks even after the bacteria are gone, treatment also focuses on comfort and preventing spread to others through early testing, treatment of close contacts, and staying home until it is safe to return.
Can you cure Pertussis?
Yes, pertussis, also called whooping cough, can usually be treated with antibiotics, especially if treatment starts early. The medicine helps clear the infection and makes it less likely to spread to others, but the cough can still last for weeks because the airways need time to heal. Rest, fluids, and sometimes hospital care for babies or people with breathing trouble can help manage symptoms and prevent complications.
Non-drug treatment
Pertussis can make day-to-day life exhausting, with coughing fits that interrupt sleep, meals, and even catching your breath. Non-drug treatment is mainly supportive, helping protect breathing, hydration, and recovery while the illness runs its course. Managing this condition often means using simple steps at home for milder cases and closer support in the hospital for babies, older adults, or anyone having trouble breathing. Because the early symptoms of pertussis can look like a common cold, supportive care may start before the diagnosis is fully clear.
Quiet rest can help conserve energy when coughing spells leave you worn out. Many living with pertussis find it helps to avoid overexertion until breathing and sleep begin to improve.
Sips of fluid taken often can help prevent dehydration, especially after vomiting with cough. Small, frequent meals may be easier than large ones when coughing fits interrupt eating.
Cool, fresh air and a smoke-free space can reduce irritation that sets off coughing. It also helps to avoid strong fumes, dust, and other triggers whenever possible.
Some people find that moist air from a cool-mist humidifier can soothe the airways a little. The device should be kept clean to avoid spreading germs or mold.
Your genes may have an impact on how drugs work for you
For pertussis, also called whooping cough, treatment usually relies on antibiotics and supportive care, and for most people, small genetic differences do not play a major role in how well these medicines work. That said, inherited differences can sometimes affect how the body breaks down certain medicines, which may change the chance of side effects or how strongly a drug affects someone. In everyday care for pertussis, though, genetic testing is not a routine part of choosing treatment, because it usually does not change the plan.
Pharmacological treatments
Treatment for pertussis mainly uses antibiotics to lower the chance of spreading the infection, especially when started early. The medicines used most often are azithromycin, clarithromycin, and erythromycin, with trimethoprim-sulfamethoxazole as an alternative for some people who cannot take those drugs. Sometimes medicines are taken short-term (acute treatment), while others are used long-term (maintenance therapy), but for pertussis, antibiotics are usually a short course and work best during early treatment for pertussis.
Azithromycin is often the first choice because it is effective and usually easier to take than older options. It can be used in infants, children, and adults, and the course is often shorter than with some other antibiotics.
Clarithromycin is another macrolide antibiotic used to treat pertussis. It works in a similar way to azithromycin, but it is usually taken more than once a day and may cause stomach upset in some people.
Erythromycin also treats pertussis and has been used for many years. It can work well, but nausea, cramps, or diarrhea are more common, so many living with pertussis find newer macrolides easier to tolerate.
Trimethoprim-sulfamethoxazole may be used if someone cannot take macrolide antibiotics. It is generally an option for children older than 2 months and adults, but it is not used in young infants.
Genetic influences
Pertussis is not usually something people inherit from their parents; it is an infection caused by bacteria, so the main risks are close contact with someone who has it, being too young to be fully vaccinated, or having protection from past vaccination wear off. It’s natural to ask whether family history plays a role. In most cases, pertussis does not run in families because of a single gene change, and having a relative who had it does not mean you are genetically likely to get it too. Researchers are still studying whether small differences in immune system genes may affect how strongly some people respond to infection or vaccines, but this is not part of routine care and does not explain most cases. If you are worried about the risk of pertussis in families, the more useful clues are usually vaccination history, recent exposure, and age rather than inherited genes.
Is Pertussis genetic?
Genetics are usually not a major factor in whether someone gets pertussis. Small differences in immune-related genes may affect risk or severity, while genetic variations in the pertussis bacteria can influence spread and, at times, vaccine protection.
Having a genetic risk is not necessarily a diagnosis
Changes in genes, often called genetic variants, are common in the general population and are a normal part of human biology. Most do not directly affect health and simply reflect natural differences among people. For many genes, having a variant associated with a condition points to a possible link, not a certain diagnosis, especially when several genes and environmental factors play a part. In some cases, though, one well-understood variant in a specific gene is enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For most people with pertussis, treatment is chosen mainly by age, how early the illness is found, pregnancy status, medicine allergies, and who else may be at risk of catching it. The usual antibiotics, most often azithromycin or other related drugs, are picked because they help reduce spread and are generally the safest fit for the situation, especially for infants and during pregnancy. Genetics may play a small part in how your body handles some medicines or how likely side effects are, but there is no routine genetic test that doctors use to choose pertussis treatment today. Not every difference in response is genetic, but other medicines you take, liver function, and age often matter more when deciding which antibiotic is best. So if you are wondering how genetics may affect antibiotic treatment for pertussis, the short answer is that genetics can matter in limited ways, but they are not usually the main reason one drug is chosen over another.
Interactions with other conditions
A long stretch of coughing from pertussis can be especially hard on people who already have asthma, COPD, or other lung conditions, because the infection can trigger more wheezing, shortness of breath, and trouble sleeping. In babies, older adults, and anyone with heart or lung disease, pertussis can also raise the risk of complications such as pneumonia, which may make recovery slower and more serious. Someone might notice their symptoms flare when another condition is active. For example, a child with asthma may have more coughing attacks during a pertussis infection, while an older adult with chronic lung disease may find everyday activities like walking across a room much more tiring. People with weakened immune systems may not always have the classic “whoop,” but they can still become quite ill and may be more likely to need close medical follow-up. Because severe coughing can lead to vomiting, poor feeding, or dehydration, pertussis can also be more disruptive in people already dealing with frailty or other ongoing illnesses.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Pertussis?
Other illnesses that can look like pertussis, also called whooping cough, include a bad cold or other virus, bronchitis, asthma, and pneumonia. In babies and young children, RSV and other chest infections can also cause coughing fits that seem similar at first. Doctors may also think about reflux or mucus dripping from the nose into the throat when someone has a cough that will not go away, but those usually do not cause the same repeated, hard coughing spells.
History
Long before modern testing, doctors and families recognized a pattern of illness that came in exhausting bursts of cough, often followed by vomiting or a desperate, noisy breath in. Throughout history, people have described pertussis in ways that match this picture, even when they used different names for it. Large outbreaks were recorded in Europe as far back as the 1500s, and over time the illness became widely known as whooping cough because of the sound some children made when trying to breathe in after a coughing spell.
As medical science improved, physicians began separating pertussis from other infections that also cause cough and fever. That mattered in everyday life. A child who seemed to have an ordinary cold at first might, a week or two later, start having repeated coughing fits severe enough to interrupt sleep, school, feeding, and play. By the late 1800s and early 1900s, researchers had identified the bacterium behind pertussis, which helped doctors understand how it spreads and why outbreaks could move quickly through households, schools, and neighborhoods.
The biggest turning point in the history of pertussis came with vaccination in the 20th century. Once vaccines were introduced and used widely, illness and death from pertussis dropped sharply in many countries, especially among infants and young children, who are at the highest risk of severe disease. Even so, pertussis did not disappear. Over time, doctors learned that protection can fade, and that teenagers and adults with milder symptoms can still pass the infection to babies.
In recent decades, awareness has grown that early symptoms of pertussis can look a lot like a common cold, which is one reason the infection can be missed at first. Better testing and public health tracking have also shown that outbreaks still happen, including in places with routine vaccination. Knowing this history helps explain why booster shots, timely diagnosis, and protecting newborns remain such important parts of pertussis care today.