Whooping Cough Epidemic

Is the United States Experiencing a Whooping Cough Epidemic?

The word “epidemic” should be used carefully. Pertussis activity does not rise evenly across the country, and a national decline can occur while individual states, counties, schools, or childcare centers are still dealing with outbreaks.

U.S. health officials describe pertussis as a cyclical disease. Cases commonly rise and fall over several years, even in communities with established vaccination programs. In 2024, the country returned to more typical pre-pandemic transmission patterns, when more than 10,000 cases were usually reported annually. Preliminary surveillance found that the number reported in 2024 was more than six times the 2023 total.

California illustrates how quickly local conditions can change. The state recorded more than 2,000 cases between January and October 2024, compared with fewer than 400 during the same months in 2023. Sixty-two infants younger than four months were hospitalized, and one infant died.

By July 10, 2026, preliminary national data showed fewer cases than at the same point in 2025. However, reporting delays, missed diagnoses, and regional differences mean that parents should still pay attention to alerts from local schools, healthcare systems, and public-health departments.

What Is Whooping Cough?

Whooping cough, medically known as pertussis, is a respiratory infection caused by the bacterium Bordetella pertussis. The bacteria attach to tiny hair-like structures called cilia in the upper respiratory tract. They release toxins that damage those cilia, inflame the airways, and interfere with the body’s normal process for clearing mucus.

The result is not an ordinary “drink some tea and complain for two days” cough. Pertussis can cause violent coughing fits that continue for weeks or months. It is sometimes called the 100-day cough because the recovery process can be impressivelyand unpleasantlylong.

How Pertussis Spreads

Whooping cough spreads primarily through respiratory droplets released when an infected person coughs, sneezes, talks closely, or spends extended time near others. Household transmission is particularly common because families share rooms, meals, vehicles, air, and occasionally the same unfortunate box of tissues.

People are usually most contagious during the early stage, when symptoms resemble a minor cold. This makes pertussis difficult to control. A person may attend school, work, church, sports practice, or family gatherings before realizing that the harmless-looking sniffle is something more serious.

Children’s Hospital of Philadelphia notes that approximately eight out of ten nonimmune people may become infected after close exposure. Vaccinated people can still develop pertussis, but they usually experience a milder illness.

Why Whooping Cough Outbreaks Keep Returning

Pertussis Naturally Moves in Cycles

Even with widespread vaccination, pertussis has never been eliminated from the United States. The bacteria continue circulating among people, and reported infections tend to increase every few years. A quieter year does not necessarily mean the pathogen has packed a suitcase and moved elsewhere.

Vaccine Protection Decreases Over Time

DTaP and Tdap vaccines provide important protection, particularly against severe disease and complications. However, immunity gradually weakens. A teenager or adult vaccinated years earlier may become infected, experience symptoms that look like bronchitis or a lingering cold, and unknowingly expose a baby.

This waning protection is one reason adolescents receive a Tdap dose at age 11 or 12. Adults who never received Tdap should receive one dose, while pregnant patients should receive Tdap during every pregnancy.

Some Children Fell Behind on Routine Vaccines

Routine childhood immunization was disrupted during the COVID-19 pandemic. Missed wellness visits and delayed vaccination left some children without the full recommended DTaP series. When vaccination coverage declines within a school or neighborhood, pertussis gains more opportunities to spread.

The Infection Is Easy to Miss

The famous “whoop” is not guaranteed. Adults, teenagers, previously vaccinated children, and young infants may never make the classic sound. A vaccinated adult might simply have a persistent cough, while an infant may stop breathing temporarily without producing much of a cough at all.

This stealthy presentation allows infected people to continue normal activities during the period when they can most easily transmit the bacteria.

Whooping Cough Symptoms and Stages

Symptoms commonly appear five to ten days after exposure, although the incubation period can extend to about three weeks. Pertussis usually develops in three recognizable stages.

Stage 1: Cold-Like Symptoms

During the first one or two weeks, symptoms may include:

• A runny or stuffy nose
• Sneezing
• A mild, occasional cough
• Watery eyes
• A low-grade fever

This is often the most contagious phase. It is also the phase most likely to be dismissed as “just a cold,” which is excellent news for the bacteria and terrible news for everybody else.

Stage 2: Severe Coughing Fits

After one or two weeks, the cough may become rapid, violent, and difficult to control. These attacks, called paroxysms, may cause:

• A high-pitched whoop or gasp when inhaling
• Vomiting during or after a coughing episode
• Exhaustion
• Difficulty eating, drinking, or sleeping
• Shortness of breath
• Redness or bluish-gray skin around the mouth
• Chest, abdominal, or rib pain

Coughing fits commonly continue for one to six weeks and may last as long as ten weeks. Some adults cough hard enough to fracture a rib, which is a remarkably rude feature for one bacterium to include.

Stage 3: Slow Recovery

The cough gradually becomes less frequent, but recovery can take weeks or months. New respiratory infections may temporarily trigger coughing attacks again, even after the pertussis bacteria are no longer present.

Why Whooping Cough Is Especially Dangerous for Babies

Infants younger than one year face the greatest risk of hospitalization, complications, and death. Babies younger than four months are particularly vulnerable because they are too young to have completed the primary DTaP vaccine series.

About one in three U.S. babies younger than one year who develops pertussis requires hospital care. Hospitalized infants may experience apnea, pneumonia, seizures, feeding difficulties, dehydration, brain complications, or dangerously low oxygen levels.

A baby may not cough or make a whooping sound. Instead, caregivers may notice pauses in breathing, poor feeding, unusual sleepiness, color changes, or difficulty catching a breath. Any breathing problem in a young infant requires immediate medical attention.

Emergency Warning Signs

Call emergency services or seek urgent medical care when a person:

• Stops breathing or has repeated pauses in breathing
• Has blue, gray, or unusually pale lips or skin
• Struggles to breathe between coughing fits
• Has a seizure
• Cannot remain awake or responsive
• Shows signs of severe dehydration

Parents should also contact a pediatrician promptly when an infant has been exposed to pertussis, even when the baby appears well.

How Whooping Cough Is Diagnosed

A healthcare professional will consider symptoms, recent exposures, vaccination history, local outbreak activity, and the length of the cough. Because early pertussis resembles several viral infections, laboratory testing may be necessary.

Common diagnostic methods include:

• Culture: Considered the diagnostic gold standard and most useful during the first two weeks after coughing begins.
• PCR testing: A rapid and sensitive test generally used during the first three to four weeks of coughing.
• Serology: Sometimes used later in the illness, although the accuracy of commercial antibody tests varies.

Testing usually involves collecting a sample from the back of the nose. It is not anyone’s favorite five seconds, but obtaining an accurate result can help protect an entire household.

Treatment During a Whooping Cough Epidemic

Healthcare professionals treat pertussis with prescription antibiotics. Treatment works best when started during the early cold-like phase, before severe coughing attacks develop. Early therapy may reduce the seriousness of the infection and helps prevent transmission.

Once coughing fits are well established, antibiotics may not make the cough disappear quickly because airway damage and inflammation need time to heal. However, treatment can still reduce the risk of spreading the bacteria to others.

People receiving appropriate antibiotics are generally advised to remain away from school, work, childcare, and close social contact until they have completed five full days of treatment. Untreated patients may remain contagious for about three weeks after the cough begins. Patients should follow instructions from their healthcare provider or local health department.

Postexposure Antibiotics

Doctors or public-health officials may recommend preventive antibiotics after close exposure. Priority groups include:

• Household contacts of a confirmed case
• Infants younger than 12 months
• People with health conditions that increase their risk
• Pregnant patients in the third trimester
• People who work or live around high-risk individuals

Preventive treatment is often considered within 21 days of exposure or within 21 days after the original patient’s cough began. Antibiotics should not be borrowed, shared, or started without professional guidance.

Comfort Measures at Home

Supportive care may include rest, frequent fluids, smaller meals, and a clean-air environment. Smoke, dust, strong fragrances, and fireplace fumes may trigger additional coughing. Over-the-counter cough medicines generally do not control pertussis attacks effectively and should not be given to young children unless a healthcare professional recommends them.

Vaccination: The Best Defense Against Severe Pertussis

Pertussis vaccines are not perfect force fields, but they significantly reduce the risk of serious disease, hospitalization, and complications. The United States uses two combination vaccines: DTaP for young children and Tdap for older children and adults.

Recommended DTaP Schedule for Children

• 2 months
• 4 months
• 6 months
• 15 through 18 months
• 4 through 6 years

Tdap for Adolescents and Adults

Adolescents should receive one Tdap dose at age 11 or 12. Adults who never received Tdap should receive one dose, regardless of when they last received a tetanus-containing vaccine. Afterward, adults generally receive either Td or Tdap every ten years for tetanus and diphtheria protection.

Tdap During Every Pregnancy

Pregnant patients should receive Tdap during every pregnancy, preferably during the early part of weeks 27 through 36. The mother develops antibodies and transfers some of them to the baby before birth, providing temporary protection during the newborn’s most vulnerable months.

Vaccination during a previous pregnancy is not considered sufficient for a later pregnancy because antibody levels decline. Family members and caregivers should also confirm that they are current on recommended vaccines before spending time with a newborn.

How Schools, Workplaces, and Families Should Respond

When a case is identified, avoid launching a neighborhood detective agency through group chat. Contact the appropriate healthcare provider, school nurse, employer, or local health department and follow their instructions.

A practical outbreak response includes:

• Identifying close contacts and high-risk individuals
• Reviewing vaccination records
• Keeping contagious patients away from shared settings
• Seeking testing early when symptoms develop
• Using preventive antibiotics only when recommended
• Covering coughs and sneezes and washing hands regularly
• Improving indoor ventilation when practical
• Avoiding contact between sick people and infants

Masks may reduce respiratory-droplet exposure when a symptomatic person must briefly be around others, but they should complementnot replacemedical evaluation, isolation guidance, and vaccination.

Experiences Related to a Whooping Cough Epidemic

The following are composite scenarios based on common outbreak patterns. They are not presented as personal accounts or descriptions of specific patients.

The Daycare Notice Nobody Expected

A family receives an email from their toddler’s daycare announcing that a child has tested positive for pertussis. Their daughter has no fever and only coughs occasionally, so the parents initially assume there is little reason to worry. Then they remember that the child’s three-month-old brother is at home.

The pediatrician asks when the toddler’s cough started, reviews both children’s vaccination records, and evaluates whether preventive antibiotics are appropriate. The baby is too young to have received more than the first DTaP dose, so the healthcare team treats the exposure seriously even though he appears healthy.

The experience teaches the family an important lesson: outbreak management often begins before anyone looks dramatically ill. The most valuable phone call may occur during the boring, sniffly phase rather than after the unmistakable coughing fits begin.

The Teenager Without a Whoop

A high-school student develops a cough that refuses to leave. He continues attending class because he has no high fever and feels normal between coughing episodes. After two weeks, the attacks become strong enough to cause vomiting after basketball practice.

His family expects the doctor to diagnose asthma, allergies, or a persistent viral infection. Instead, the clinician asks about school outbreaks and discovers that the student’s Tdap booster was delayed. Testing confirms pertussis.

No one in the household had heard a classic whooping sound. That absence created false reassurance. The student’s experience demonstrates why teenagers and vaccinated adults can become quiet links in a chain of transmission. Their symptoms may be milder than those of an unvaccinated child, yet they can still expose grandparents, pregnant relatives, or newborns.

The Long Recovery

Another family begins treatment quickly after a confirmed household exposure. The antibiotics reduce the risk of further spread, but the sick parent continues coughing for weeks. This creates understandable confusion: if the bacteria have been treated, why is the cough still conducting nightly concerts?

The clinician explains that antibiotics do not instantly repair irritated airways. Recovery is gradual. The family rearranges sleeping spaces, removes scented products, avoids smoke, keeps water nearby, and serves smaller meals to reduce vomiting after coughing attacks.

They also learn that returning to work depends on contagiousness guidance, not on whether every cough has disappeared. A person can remain symptomatic after completing the recommended antibiotic period without necessarily remaining infectious.

Protecting a Newborn Before Birth

During a local outbreak, a pregnant patient receives Tdap early in the recommended 27-to-36-week window. Her partner checks his records and discovers that he never received an adult Tdap dose. The grandparents do the same before visiting.

This strategy does not guarantee that nobody will become infected. It layers protection around the newborn: maternal antibodies before birth, vaccination of close contacts, careful attention to symptoms, and reduced contact with anyone who is coughing.

The broader lesson from these experiences is that a whooping cough epidemic is rarely controlled by one dramatic action. Control comes from a collection of ordinary decisions made earlychecking records, calling a clinician, staying home while contagious, completing treatment, and refusing to bring “just a little cough” to meet a newborn.

Conclusion

A whooping cough epidemic is not merely a wave of noisy coughs. Pertussis is a highly contagious bacterial illness that can spread before its most recognizable symptoms appear. It may cause months of coughing in adults and life-threatening breathing problems in infants.

Although preliminary U.S. reports showed lower pertussis activity in the first part of 2026 than during the same period in 2025, periodic outbreaks remain a public-health concern. Falling vaccination coverage, waning immunity, delayed diagnosis, and mild infections in adults or teenagers can keep transmission moving.

The practical response is straightforward: keep children current on DTaP, obtain the recommended adolescent or adult Tdap dose, receive Tdap during every pregnancy, report meaningful exposures promptly, and seek care for violent coughing or breathing difficulties. Pertussis may be persistent, but informed families and timely medical care can make its job considerably harder.