Whooping cough

Also called Pertussis or 100-day cough

Whooping cough (pertussis) is a bacterial infection that spreads very easily. It starts like a cold, then after about a week causes long coughing bouts that can end with a "whoop" sound as the person breathes in, or with being sick. The cough can last for weeks or months. Babies under 6 months are most at risk of serious problems.

Last updated Nov 9, 2026

What it is

Antibiotics may be given in the first weeks to stop it spreading. Babies with whooping cough often need hospital care.

Babies and children are vaccinated as part of routine immunisations, and vaccination in pregnancy protects newborns.

Common signs

  • Cold-like symptoms at first
  • Long bouts of coughing, worse at night
  • A "whoop" sound when breathing in after coughing
  • Being sick after coughing
  • Babies may go red or blue, or briefly stop breathing

How it is usually diagnosed

  • Questions about symptoms
  • A swab from the back of the nose
  • Blood test

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Swab and blood test results
  • Vaccination records
  • GP or paediatric notes
  • Hospital discharge letters

Questions to ask your doctor

  • Do I need antibiotics?
  • How long should I stay away from others?
  • Are my family protected by vaccination?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A baby or anyone who stops breathing, turns blue or grey, or has severe difficulty breathing: call 112
  • A baby under 6 months with a cough that might be whooping cough: get urgent help the same day

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources