Pertussis (Whooping Cough): Symptoms, Care and Prevention

This guide is general health education, not a diagnosis or an individual treatment plan. Suspected whooping cough in a young baby needs prompt medical assessment. Source-checking is editorial work and does not mean this article has been reviewed by a licensed clinician. Local clinical and public-health advice takes priority.

What is pertussis, or whooping cough?

Pertussis is a very contagious bacterial infection of the breathing passages, caused by Bordetella pertussis. It can affect babies, children, teenagers and adults. The bacteria attach to tiny hair-like structures called cilia that help clear the airways. Their toxins damage these structures and cause swelling. This helps explain why the illness can produce a prolonged cough rather than behaving like a brief cold. The familiar name, whooping cough, describes one possible sound during an attack; that sound is not present in everyone. Babies are especially vulnerable, while an older person with relatively mild symptoms can unknowingly expose them. The practical priorities are recognizing concerning symptoms, getting timely assessment and protecting people who could become seriously ill. [1]

Pertussis symptoms and the usual stages

The beginning can resemble a cold

Early symptoms commonly include a runny or blocked nose, a mild occasional cough and little or only low-grade fever. This phase often lasts one to two weeks. As the illness develops, coughing may become rapid, violent and difficult to control. A person may vomit during or after a fit, feel exhausted afterwards, and sleep badly because of repeated nighttime attacks. They may look surprisingly well between episodes. Coughing fits commonly continue for several weeks and sometimes much longer. These patterns are useful clues, but they cannot establish the diagnosis by themselves. Seek assessment for severe coughing rather than waiting for every textbook feature to appear, particularly when someone vulnerable lives in the household. [2]

A timeline is a guide, not a prediction

Babies and vaccinated people may not whoop

In infants, the cough can be slight or absent, and apnea, meaning a pause in breathing, may be the main sign. A baby does not need a loud cough to have dangerous pertussis. Previously vaccinated children, teenagers and adults may have a milder or less recognizable illness, without the characteristic whoop or obvious coughing fits. Vaccination therefore changes the likelihood and severity of illness but does not make symptoms irrelevant. When speaking to a clinician, describe breathing pauses, changes in color, feeding difficulties and unusual exhaustion as well as the cough itself. A reassuring interval between episodes does not cancel a concerning event during one. Young and incompletely vaccinated infants need particular attention because severe complications are more likely in this group. [3]

Complications can involve more than coughing

Pertussis can lead to pneumonia, dehydration, loss of appetite and complications related to intense coughing. These can include hernias or rib fractures; very severe illness may involve seizures or brain injury. The greatest danger is in young infants, who may not yet have completed their vaccinations. Older children and adults usually have less severe illness, but prolonged symptoms can still be disruptive and occasionally serious. Tell your clinician if pain, eating, drinking or daily functioning is becoming a problem. Assessment should consider the whole illness rather than simply counting coughs. A person recovering at home may need a different level of care if new complications develop, and a previously mild infection should not be assumed to remain mild throughout. [6]

A long cough is not always pertussis

Many illnesses and irritants cause coughing. A lingering cough can follow another respiratory infection; allergies, reflux, smoking and other problems can also contribute. A clinician may need to examine the chest or investigate a cause beyond pertussis, especially if symptoms are changing or recovery is not progressing. NHS advice recommends assessment when a cough lasts longer than three weeks, with earlier urgent help for concerning symptoms such as difficulty breathing or coughing blood. Do not use the three-week threshold as a reason to delay care after a known whooping-cough exposure or when a baby is unwell. Explain what is different from your usual cough and whether there has been an improvement followed by a new deterioration. [30]

How whooping cough is assessed and tested

Prepare a short symptom and exposure history

Symptoms generally begin five to ten days after exposure, although the interval can extend to about three weeks. This makes recent contact history useful: a clinician may ask about household illness, childcare, school, healthcare work and time spent with someone who has a prolonged cough. Note when the first cold-like symptoms appeared and when the cough started, because those may be different dates. Bring vaccination records and mention contact with babies or anyone whose health could be seriously affected. The clinical assessment and a properly collected sample work together. Public-health reporting may also form part of the response. The aim is to make a timely care plan, rather than waiting for a perfectly typical sequence of symptoms before taking the possibility seriously. [32]

What a sample collection may feel like

Testing commonly uses a sample collected from the back of the nose, called the nasopharynx. A trained professional may pass a swab through a nostril or obtain a sample using saline and gentle suction. The procedure can briefly feel uncomfortable and may make someone cough or gag. It is different from simply wiping the front of the nose at home. Tell the clinician about antibiotics already taken, because they can affect results. Special preparation is usually unnecessary, but follow the collecting service’s instructions. Ask which test is being ordered, how the result will reach you and what to do while waiting. The laboratory result is interpreted alongside symptoms, medical history and possible exposure, rather than serving as an isolated answer. [8]

Test timing affects what a result can tell you

Why a negative PCR may not settle the question

PCR looks for bacterial genetic material. Its sensitivity is best early in the coughing illness, and antibiotics or a late sample can make a negative result harder to interpret. CDC notes that PCR after five days of antibiotics is generally unlikely to be useful. A positive result also needs clinical context, since contamination and differences between laboratory methods can affect interpretation. These limitations are reasons to discuss results with the treating clinician, not reasons to ignore testing. CDC advises against PCR testing people who have no symptoms merely because they are close contacts, and against using their test results to decide preventive antibiotics. Exposure management follows a separate assessment of who was exposed, when it happened and who is vulnerable. [10]

Pertussis treatment: why timing matters

Early antibiotics may help before severe fits begin

Clinicians may start antibiotics before results return when the history strongly suggests pertussis, the patient is at high risk, or they will have contact with someone vulnerable. Treatment in the first one to two weeks is most likely to reduce symptom severity. It does not instantly stop an established cough, and late treatment may offer little benefit. US CDC guidance generally considers treatment within three weeks of cough onset for people aged one year and older, and within six weeks for infants younger than one year and pregnant patients, particularly near term. These are clinical decision windows, not instructions to wait. Antibiotic choice depends on age, pregnancy, interactions, adverse-effect risks and resistance. Macrolides such as azithromycin are commonly used; alternatives are appropriate only in selected circumstances. A clinician must choose the medicine and regimen, especially for a very young baby. [11]

Take the prescribed course safely

Use antibiotics exactly as directed on the prescription and accompanying information. If a dose is missed, check the medicine leaflet or ask a pharmacist instead of doubling a later dose. Nausea, diarrhea and stomach discomfort can occur, and troublesome side effects deserve advice. Breathing difficulty, swelling of the face or throat, or other signs of a severe allergic reaction require emergency care. Keep the medicine instructions available to anyone helping with care so that doses are not accidentally repeated. Antibiotics are used for particular bacterial infections and do not treat ordinary viral colds. Let the prescriber decide whether they are needed rather than treating every cough with a leftover antibiotic. If the instructions are unclear, clarify them before taking the next dose. [12]

Mention travel and unexpected lack of improvement

Antibiotic-resistant pertussis has been reported internationally. CDC’s June 2026 guidance describes reported macrolide resistance as rare in the United States, while emphasizing the importance of recent travel and appropriate laboratory investigation. Tell the clinician where you have traveled and whether symptoms are failing to improve as expected. They may arrange culture or resistance testing and reconsider the antibiotic when clinically indicated. This is a reason for reassessment rather than self-switching medicines. The decision also affects preventive treatment for contacts if resistance is confirmed. Keep the original treatment dates and test information available so that a second clinician can understand what has already been tried. A resistance concern needs professional interpretation, especially when medicine options are restricted by age or other health factors. [13]

Care at home and recovery

Make breathing, food and fluids easier

Home care focuses on comfort and avoiding problems while the airways recover. Keep the environment free of smoke, dust and chemical fumes that trigger coughing. Smaller meals may be easier to manage than large ones when coughing causes vomiting. Follow age-appropriate advice about fluids, and ask the treating team what to do if eating or drinking becomes difficult. Do not add cough medicines unless a clinician recommends them; they often do not help pertussis and may be unsuitable for young children. People with severe illness may need hospital care to keep breathing passages clear, monitor breathing, provide oxygen or give fluids through a vein. Needing hospital support does not depend on having a dramatic whoop: breathing and hydration are more important than the sound of the cough. [14]

Help a child rest without overlooking deterioration

A child may seem quite comfortable between bouts yet become tired by repeated attacks. Allow plenty of rest, offer small frequent sips when appropriate for their age, and remove cigarette smoke and aerosol sprays from their surroundings. Follow the child’s clinical plan rather than trying to push through normal activities. If breathing becomes rapid, noisy or difficult, arrange urgent assessment. Loss of consciousness, stopped breathing or blue or purple coloring around the lips is an emergency. Young babies commonly need hospital assessment and support. When another adult takes over care, explain what the child’s usual episodes look like, what has changed and how to get help. A brief description of the pattern is more useful than assuming the next caregiver will recognize danger from the cough alone. [15]

Watch hydration, especially with vomiting or poor feeding

Dehydration develops when fluid losses exceed intake. Warning signs include fewer wet nappies or less frequent urination, dark urine, a dry mouth, few tears, unusual drowsiness or a sunken soft spot in a baby. These signs need urgent advice, particularly in infants. For an older child or adult who feels sick, small sips may be easier than a large drink. Continue a baby’s usual breastmilk or formula unless the clinical team advises otherwise, and do not dilute formula. Ask a pharmacist or clinician whether an oral rehydration product is appropriate. Difficulty waking, confusion, cold or blotchy skin, or breathing difficulty alongside dehydration can indicate an emergency. Keep track of drinking and wet nappies so that the clinician can assess the change rather than relying only on whether the person feels thirsty. [7]

Recovery and contagiousness are different questions

The cough can continue for many weeks even after appropriate antibiotics. Persistent coughing therefore does not automatically mean the medicine failed or that the person remains infectious throughout recovery. At the same time, a cough that is worsening, new breathlessness or a new concern should be reviewed rather than dismissed as inevitable. Some babies need intensive hospital support; older people can develop pneumonia, and people with asthma or who smoke may need additional assessment. Ask the treating service what improvement to expect and when to check back. Keep the agreed return-to-school or work date separate from your expectations about energy and sleep. Someone may meet infection-control requirements before feeling ready for a full day of normal activity. [29]

How pertussis spreads and how to protect other people

Pertussis spreads when infectious particles are breathed in or when infected respiratory secretions reach another person’s eyes, nose or mouth. Close contact and shared breathing space matter. Contaminated surfaces are a less common route, so cleaning alone cannot replace avoiding exposure. Vaccination is the most effective preventive measure, but an exposed person still needs individualized advice. Protection decreases with time, and people of any age can be affected. In practical terms, ask about exposure promptly, keep vaccination records accessible and follow the specific advice given for the household. Our guide to everyday infection-control precautions explains general hygiene measures; those measures complement the pertussis-specific instructions from your clinician or public-health service. Do not assume a familiar visitor is safe simply because their cough seems mild. [20]

United States: follow the five-day treatment rule and local instructions

US CDC guidance considers a person with pertussis no longer contagious after five days of appropriate antibiotic treatment. Its healthcare-personnel guidance excludes symptomatic staff with suspected or confirmed pertussis until that treatment period has passed, or for twenty-one days from cough onset without effective treatment. Healthcare workplaces also have rules for exposed staff who feel well, particularly if they care for high-risk patients. Tell occupational health about the exposure before returning to patient contact. For school, childcare or other employment, obtain the exact return date from the treating service and relevant local authority. The antibiotic must be appropriate and taken as directed; simply obtaining a prescription does not complete the exclusion period. Keep away from vulnerable people while awaiting that advice. [17]

United Kingdom: NHS return guidance uses a different interval

NHS guidance says to stay away from school, work or nursery until forty-eight hours after starting antibiotics, or three weeks after the cough began if antibiotics are not taken. This UK instruction differs from the US five-day advice. Use the rule for your location and setting, and ask the treating service to confirm the calendar date rather than combining the two intervals yourself. [5]

What close contacts need to know

US preventive antibiotics are targeted by exposure and risk

Postexposure prophylaxis, or PEP, means antibiotics given after exposure to help prevent illness. CDC supports PEP for asymptomatic household contacts within twenty-one days of the infected person’s cough onset. It also supports PEP within twenty-one days of exposure for people at high risk and people who will be in contact with them. High-risk groups include infants under twelve months and people with conditions that pertussis could worsen, such as some immunocompromising conditions or moderate to severe medically treated asthma. Third-trimester pregnancy matters because infection could reach the newborn. Vaccination does not automatically remove the need for this assessment. Contact a clinician or public-health team promptly and give the exposure dates. Widespread or repeated antibiotics are not automatically useful during continuing community transmission; monitoring may be advised instead. If symptoms start, report them because the plan may change from prevention to assessment and treatment. [16]

England: public health prioritizes protecting vulnerable infants

UKHSA guidance asks services to consider contacts of clinically suspected, linked and confirmed cases. Priority groups include infants younger than one year who have had fewer than three pertussis-containing vaccine doses, and people at increased risk of passing infection to those infants. This is a professional contact-management process rather than a request for everyone in a classroom or workplace to seek antibiotics. If a case is reported near you, explain whether there is a vulnerable baby in the household or regular contact with one. Follow the advice addressed to your particular setting. A notice about exposure should lead to an appropriate risk assessment, not a self-made prescription plan. Local teams can clarify who needs action and which symptoms should trigger a call. [18]

Why health services may ask about contacts

Public-health reporting helps services recognize linked cases and reduce further spread. For example, Canada requires healthcare providers to report suspected pertussis to the local public-health service, with further reporting through provincial and territorial systems. Other countries have their own notification arrangements. You may be asked about household members, work, school and contact with babies so that the response can focus on people who need protection. Give accurate dates and tell the team if relevant information changes. Ask whether they will contact a school or workplace, what you should communicate yourself and how to obtain an official return-to-attendance instruction. This keeps practical responsibilities clear while allowing the clinical team to direct testing, treatment and exposure management. [19]

Pertussis vaccination and prevention across the life course

Schedules belong to a country and an individual history

WHO identifies vaccination as the best way to prevent pertussis and emphasizes completing an infant primary series with pertussis-containing vaccines. National programmes build on that principle using their own schedules, available products and local disease patterns. Some include additional childhood or adolescent boosters and vaccination during pregnancy. These details explain why a vaccine age quoted on an international website may differ from the appointment offered locally. If you move countries, take the actual vaccine record to the new service instead of assuming that similar vaccine names represent identical schedules. Ask which doses are recognized and what remains due. Pregnancy vaccination adds early protection for the baby; it does not remove the need for the baby’s own routine vaccinations. [28]

United States: DTaP, Tdap and adult boosters

CDC recommends a routine five-dose DTaP series at two, four and six months, fifteen to eighteen months, and four to six years. A routine adolescent Tdap dose is given at eleven to twelve years. Adults who have never received Tdap should receive a dose. DTaP and Tdap both include tetanus, diphtheria and pertussis protection, but the formulations and age indications differ. For adults, the usual ten-year Td or Tdap booster is intended to maintain tetanus and diphtheria protection; CDC does not recommend recurring boosters specifically to maintain pertussis immunity. Pregnancy has its own recommendation. If records are incomplete or there is a vaccine contraindication, ask a vaccination professional to work out the appropriate plan rather than substituting one product or timing for another. [21]

United States: Tdap during every pregnancy

CDC recommends Tdap during each pregnancy, preferably early in the twenty-seven to thirty-six-week window. Antibodies made after vaccination pass to the baby and help bridge the period before infant vaccinations can provide protection. A dose after birth does not provide the same prenatal transfer of antibodies. If Tdap is given earlier in the pregnancy for a specific reason, such as wound care or an outbreak, CDC advises that it should not be repeated later in that same pregnancy. Tell the maternity team about any dose already received. Make the plan during antenatal care rather than waiting until delivery. The recommendation applies again in a later pregnancy because the goal is to provide protective antibodies to that baby, not simply to document a lifetime vaccination history. [22]

United Kingdom: pregnancy timing differs

NHS guidance usually offers whooping-cough vaccination around twenty weeks of pregnancy, with vaccination available from sixteen weeks. Having it before thirty-two weeks gives the baby the best protection, but it can still be given later if that opportunity was missed. A dose is recommended in each pregnancy. If you reach twenty weeks without an offer, contact your midwife or GP surgery. If you are already later in pregnancy, ask about the next available appointment instead of assuming that vaccination is no longer worthwhile. Mention any previous dose in the current pregnancy and any serious vaccine reaction. This is the NHS schedule, not the US gestational window. In either setting, the maternity service can resolve questions about timing alongside the rest of your antenatal care. [23]

United Kingdom: infant doses and the eighteen-month change

The NHS six-in-one vaccine includes protection against pertussis alongside five other infections. It is offered at eight, twelve and sixteen weeks. An additional dose at eighteen months applies to children born on or after 1 July 2024. That birth-date condition matters when comparing siblings’ records or reading an older timetable. If a dose has been missed, contact the GP surgery to arrange a review and catch-up appointment. The practice can check the recorded product and dates rather than relying on memory. Keep the child’s personal health record available and ask the vaccinator to explain what is due next. An updated schedule should be checked against the individual child’s age and history, especially after moving between health systems. [24]

United Kingdom: the preschool booster still matters

The NHS four-in-one preschool booster includes pertussis protection and is routinely offered at three years and four months. It strengthens protection from earlier vaccination and also covers diphtheria, tetanus and polio. If the invitation has not arrived or an appointment was missed, contact the GP surgery rather than assuming the child is fully covered by the infant series. Tell the practice about significant previous vaccine reactions and whether the child is currently unwell. The team can advise whether to proceed or rearrange. Keep the new dose recorded alongside the earlier ones so that future school, travel or healthcare questions can be answered from a complete vaccination history. [25]

Missed doses usually mean catch-up, not starting over

CDC’s catch-up guidance states that a vaccine series does not need to be restarted just because a long interval has passed. The next steps depend on the child’s age, previous valid doses and the minimum spacing needed between them. This is why a clinician needs dates rather than just a recollection that some vaccinations were given. Bring records from previous practices or countries if available, and ask for a written plan of remaining appointments. Do not try to compress several doses into a shorter interval yourself. Catch-up is an opportunity to restore protection using the appropriate schedule, not a judgment about why appointments were missed. A service can also check whether other age-appropriate vaccines are due at the same visit. [31]

Discuss reactions and contraindications before vaccination

After Tdap, temporary soreness, redness or swelling at the injection site, tiredness, headache or mild fever can occur. Before vaccination, tell the provider about a severe allergic reaction to a previous dose, serious neurological symptoms after a pertussis-containing vaccine, or other significant reactions. These details may affect the recommendation and should be assessed individually. A minor cold does not necessarily prevent vaccination, while moderate or severe illness may justify postponement. Severe allergic reactions are rare, but difficulty breathing, face or throat swelling, or collapse after a vaccine requires emergency care. Ask which side effects are expected for the actual product being offered and who to contact if something unusual happens. Product-specific information is more useful than assuming all combination vaccines have identical precautions. [26]

Plan protection before meeting a newborn

Parents, siblings, grandparents and other caregivers should check that recommended vaccinations are up to date before a new baby arrives. In US guidance, people who need a pertussis vaccine should ideally receive it at least two weeks before meeting the baby, allowing time for an immune response. A teenager or adult who has already received Tdap does not automatically need an extra dose simply to visit a newborn; pregnancy and other clinical indications are considered separately. Keep the discussion practical by checking records early rather than on the day of a visit. Vaccinating close contacts supports infant protection, but it does not replace vaccination during pregnancy or the baby’s own schedule. If an exposure occurs, tell the baby’s clinician promptly even when the family’s vaccines are current. [27]

The original video below is retained for continuity. Its age, medical accuracy and recommendations have not been independently reviewed for this update. Use the current written guidance and local clinical advice for decisions about care, vaccination and exclusion periods.