Have you ever heard a child whoop? Not a cheer. Not a shout. The sound a small body makes when it has coughed so hard and so long that the lungs are empty and the throat clamps shut and the only way to get air back in is a single, desperate, high-pitched gasp that sounds like it was ripped from the chest by force. That is whooping cough. The sound a parent never forgets. The sound a baby sometimes cannot make — because their airways are too small to whoop. They just stop breathing instead.

She was six weeks old. Too young for her first vaccination. Her older brother brought the infection home from school — a cough he had for two weeks that everyone called a cold. She started coughing at four in the morning. By six, the coughs were coming in bursts of ten or fifteen without a breath between them. Her face turned red. Then blue. Then she went silent. Her mother called an ambulance. By the time it arrived, the baby was breathing again — but the cycle repeated twice more before they reached the hospital. She spent five days on the children's ward. On oxygen. On monitoring. On antibiotics that could not stop the cough, but could stop her from spreading it to the baby in the next cot. She survived. Many do. But the ones who do not are almost always the ones too young to have been vaccinated.

This guide explains whooping cough with the seriousness it demands. How the infection takes hold, what the cough does to the body, who is most at risk, how diagnosis works, why vaccination is the only real protection, and how the right clinical equipment supports the care that whooping cough patients need. Medigear supplies certified diagnostic and monitoring equipment to hospitals and clinics across the UK — because whooping cough is not a mild childhood illness. It is a disease that suffocates babies in their cots.

How Whooping Cough Works

Whooping cough is caused by Bordetella pertussis — a bacterium that attaches to the lining of the airways and releases toxins that paralyse the tiny hairs meant to sweep mucus out. The mucus builds. The airways narrow. The body tries to clear the blockage with violent, repeated coughing fits that can last a minute or more. Between fits, the patient may look completely normal. But the next fit is always coming. And in a baby whose airways are measured in millimetres, one fit too many is one fit too late.

Three Stages

The disease has three stages. The catarrhal stage looks like a cold — runny nose, mild cough, low fever. It lasts one to two weeks. It is also the most infectious — the patient spreads whooping cough before anyone suspects more than a virus. The paroxysmal stage brings the real whooping cough — explosive bursts of coughing followed by the whoop, vomiting, exhaustion, and sometimes blue spells in babies. It lasts two to eight weeks. The convalescent stage sees the cough slowly fade over weeks or months — earning the disease its old name — the hundred-day cough. Whooping cough can last three months or more.

Babies

Babies under six months carry the highest risk. Their airways are narrow. Their cough reflex is weak. Their immune systems are immature. And they are too young to have completed the primary vaccination course. Instead of whooping, many babies simply stop breathing — an event called apnoea that happens without warning and without the dramatic coughing that older children display. A baby who goes quiet and blue during a feed, a nap, or a cough is having an apnoea episode that needs immediate intervention.

Complications

Complications in babies include pneumonia, seizures, brain damage from oxygen deprivation, and death. Whooping cough kills more babies in the UK than meningitis. Most of those deaths occur in infants under three months old — before the first vaccine dose is given. That gap — birth to first jab — is where whooping cough does its worst.

Linked Guides

For hospitals managing whooping cough alongside broader care, our guide to vital signs monitor features covers the continuous oxygen, heart rate, and respiratory monitoring that whooping cough patients need — because apnoea in a baby happens without warning and demands a monitor that catches silence as quickly as it catches noise. Our guide to portable vs stationary X-ray machines covers the chest imaging that confirms pneumonia in patients whose cough has crossed from viral mimic to bacterial complication.

Diagnosis

Diagnosis is clinical in the early stages — no test catches whooping cough faster than a doctor who recognises the pattern. A cough lasting more than two weeks with paroxysms, whooping, or post-tussive vomiting should trigger suspicion. A nasopharyngeal swab for PCR confirms the presence of the bacteria. Blood tests may show a high lymphocyte count that supports the diagnosis. But in the catarrhal stage — when treatment works best — the illness looks like a cold. The window for diagnosis overlaps with the window for spread. By the time the whoop starts, the patient has already infected everyone around them.

Antibiotics

Antibiotics treat whooping cough — but they do not stop the cough. Macrolides — azithromycin, clarithromycin, erythromycin — kill the bacteria and reduce infectiousness within five days. But the cough continues for weeks because the damage to the airway lining has already been done. Antibiotics given in the first two weeks shorten the illness and reduce the spread. Given after the paroxysmal stage starts, they do little for the patient — but still matter for the contacts.

Vaccination

Vaccination is the only reliable protection. The pertussis vaccine — given as part of the childhood schedule in the UK — reduces the risk of severe disease, hospitalisation, and death. Five doses through childhood build protection. Maternal vaccination during pregnancy — offered between sixteen and thirty-two weeks — passes antibodies to the baby through the placenta, covering the gap between birth and first jab. This single strategy — vaccinating the mother — has reduced infant whooping cough deaths more than any other intervention.

Waning Immunity

Waning immunity is the reason why whooping cough has not disappeared despite high vaccination rates. Protection from the vaccine fades over time. Teenagers and adults whose childhood immunity has waned develop mild whooping cough, which they spread to babies too young to be protected. A mother with a fading cough, she calls a chest infection, passes it to her newborn without knowing she is carrying the bacterium that will put her child in the hospital. Booster doses in adolescence and during pregnancy address this gap — but only if they are given.

Household Contacts

Household contacts of a confirmed case need antibiotic prophylaxis — especially if there is an unvaccinated baby in the home. The bacterium is transmitted via droplets during close contact. A sibling who coughs at the dinner table infects the baby at the other end. Breaking the chain requires identifying contacts, treating them, and checking their vaccination status before the cough reaches the smallest lungs in the house.

School Outbreaks

School outbreaks spread whooping cough through classrooms, corridors, and playgrounds faster than most infection control measures can contain. A child with a two-week cough who is told to stay home after a positive test has already been infectious for the entire catarrhal stage — sitting beside classmates, sharing air, and spreading a bacterium that vaccination gaps left the door open for.

Babies Who Do Not Whoop

Can your paediatric team recognise whooping cough in a baby who does not whoop? Babies under three months often present with apnoea and cyanosis, not the dramatic paroxysmal coughing that older children show. A quiet baby who turns blue during a feed or a nap may be having a whooping cough episode that looks nothing like the textbook description. The index of suspicion must be higher for the youngest patients, because the disease presents differently in the group it kills most.

Maternal Vaccination

Does your antenatal service offer maternal pertussis vaccination at every eligible appointment? Every missed dose during pregnancy leaves a newborn unprotected in the weeks before their own vaccine can start. The jab takes minutes. The antibodies cross the placenta. And the baby arrives with a defence built by the mother's immune system — a shield that lasts until the child's own vaccination takes over.

Ward Outbreak

What does your infection control team do when a whooping cough case is confirmed on a ward? Contact tracing. Antibiotic prophylaxis for close contacts. Vaccination checks. Isolation of the index case. And a review of how the bacterium reached the ward in the first place. One missed case on a neonatal unit turns a single infection into an outbreak that threatens every baby in the building.

Adults

Adult whooping cough is not harmless. A six-week cough that cracks ribs, causes vomiting, disrupts sleep, and leads to urinary incontinence in women is not a mild illness by any measure. Adults dismiss it as a persistent cold. GPs diagnose it as a chest infection. Meanwhile, the patient coughs at family gatherings, in offices, and over the baby they are visiting — spreading a bacterium they do not know they carry. Testing adults with a cough lasting more than three weeks for whooping cough catches the source before it reaches the baby.

Why Choose Medigear

Medigear supplies certified diagnostic and monitoring equipment — including pulse oximeters, vital signs monitors, and clinical accessories — to hospitals, paediatric units, and clinics across the UK. Whether you are equipping a children's ward, upgrading monitoring for respiratory emergencies, or building diagnostic readiness for infectious disease presentations, our team matches the right tools to your clinical need. Reach out to our team directly for guidance built around the smallest patients with the biggest coughs — and the clinicians who keep them breathing through every fit.