The most important thing first, because it runs against what everyone expects: in a baby, whooping cough may not produce a cough at all.
Recognising it: in a baby, whooping cough may not cough
According to CDC, many babies with whooping cough do not cough at all; instead they have pauses in breathing — CDC calls these life-threatening pauses in breathing — and such a pause can turn the baby blue or leave them struggling for air.
CDC's materials for healthcare professionals add that in babies, pauses in breathing may be the only symptom, with little or no cough. CDC also says that for some babies the illness looks like an ordinary cold for the whole of it — so “she is only snuffly, she is still feeding” rules nothing out.
In older children and adults: coughing in bursts
- According to CDC, the first one to two weeks look exactly like a cold: a runny or blocked nose, a mild fever, a mild occasional cough; only after that do the violent coughing bouts begin.
- The cough comes in BOUTS: a long burst of rapid coughs one after another, almost without a chance to draw breath, and then it stops.
- According to CDC, breathing in after a coughing bout can produce a high-pitched whoop — the name of the illness comes from it; vomiting during or just after a bout is another common sign.
- According to CDC, the characteristic whoop is less common in teenagers and adults — not hearing it rules nothing out.
What to do
- With a baby: take the clothes off and look at the chest, and look at the baby's face while they are asleep too — do not wait to see whether there is a cough.
- Write down three dates on paper: when the runny nose began, when the cough began, when the cough turned into bouts.
- Film a bout of coughing and take it with you to the appointment — according to CDC, between bouts the person usually looks well.
- According to CDC: drink plenty of fluids; eat small amounts more often so there is less vomiting; keep the house free of tobacco smoke, dust and chemical fumes; a clean cool-mist vaporiser can be used to loosen the mucus.
- Keep whoever is coughing away from babies and from anyone pregnant: a mask, a separate room to sleep in, separate towels and cups.
- Name everyone who has been close to the person who is ill — people living in the household may need antibiotics to prevent it, which is for the health authorities to decide.
What NOT to do
- Do NOT buy cough medicine yourself. According to CDC, do not use cough medicines unless a doctor prescribes them — they hardly help in this illness.
- Do NOT buy antibiotics yourself and wait at home. Whether any are needed, which ones, and who in the household should take them to prevent it, are decided by a doctor and the health authorities after testing.
- Do NOT wait for the cough to stop before being seen. According to CDC, antibiotics started early can make the illness milder, while starting after three weeks is of almost no benefit — even though the cough is still there.
- Do NOT let anyone with a persistent cough hold a baby or sleep beside one, even if they believe they just have a lingering cough after a cold.
- Do NOT treat “no high fever yet” or “the baby is still feeding” as evidence that rules it out.
- Do NOT treat having been vaccinated as the end of it — according to CDC, protection fades over time. Being vaccinated and having a sign from the box below still means being seen.
An adult with a persistent cough is where a baby catches it
According to CDC, babies under one year old are at the highest risk both of catching whooping cough and of severe complications, and many of them catch it from an older sibling, a parent or a carer — people who do not know they have it. The bacteria spread easily through the air, and according to CDC someone who is ill remains infectious for at least two weeks after the cough begins.
How serious it gets: according to CDC's materials, about one in three babies under one year old who catch whooping cough need treatment in hospital; the two commonest complications are pauses in breathing and pneumonia.
When you must go to hospital
GO TO EMERGENCY CARE or call 115 (the emergency number in Vietnam) NOW if any of the following is present — according to CDC, difficulty breathing on its own is a sign to be seen immediately. In a baby: any pause in breathing, even of a few seconds; the lips, the area around the mouth, the face or the fingertips turning blue or grey; struggling to breathe, with the hollow at the breastbone and the spaces between the ribs sucking in and the nostrils flaring; refusing the breast or unable to feed; floppy, drowsy, hard to wake; seizures. At any age: difficulty breathing or rapid breathing; coughing so hard that no breath can be drawn between bouts; a face going blue or grey-pale during a bout; new confusion; seizures; vomiting so much that nothing can be drunk; not passing urine. — BE SEEN THE SAME DAY: anyone in a house with a baby under one year old or someone pregnant has a persistent cough; or you have just been close to someone diagnosed with whooping cough, even with no symptoms. — BE SEEN WITHIN 24–72 HOURS: coughing in long bursts, vomiting after a bout, or a whoop on breathing in; a persistent cough of several weeks that is not easing; a coughing child who is not fully vaccinated against whooping cough. — If you are unsure, ring and ask; with a sign from the group above, go first and ring afterwards.
What belongs at home, and what belongs in hospital
Put plainly: suspected whooping cough in a baby is a matter for hospital. The confirming test is done at a medical facility and pauses in breathing need continuous monitoring — at home it can be neither diagnosed nor treated; we are not a substitute for the child's paediatrician.
The role of Y Te Xanh (GreenCare) is mainly with the adults or the older children in the household who are coughing: a remote consultation so you can decide between being seen now and waiting for an appointment, and a doctor coming to the house to take a history, examine, and say clearly which cases must go to a medical facility. With a sign in the box above, go in first and call afterwards.
Prevention: CDC recommends whooping cough vaccination for everyone, adults and pregnant women included. Which dose, when, and for whom are questions for a doctor or an immunisation service.
The points in this article follow the public materials of the US CDC on whooping cough, including the pages for healthcare professionals; it passes them on and does not replace being examined. Citing CDC here does not imply that CDC endorses Y Te Xanh or our services.
Need personalised advice for your loved one? Call our hotline 094 368 81 15 (24/7) — calling to ask a question or to book costs nothing. GreenCare has doctors who come to examine, nurses who carry out doctor's orders (injections, infusions, dressing changes), remote consultation by video call, and a review of the medicines you are taking; an in-depth remote consultation, or any one after the first, is a paid service. For children we take examination and acute care only — not long-term care at home, and not newborns or expectant mothers. We confirm we have staff in your area and provide transparent pricing before we begin.
Sources
- CDC — About Whooping Cough



