Whooping cough (pertussis) is a highly contagious respiratory tract infection. In many people, it's marked by a severe hacking cough followed by a high-pitched intake of breath that sounds like "whoop."
Before the vaccine was developed, whooping cough was considered a childhood disease. Now whooping cough primarily affects children too young to have completed the full course of vaccinations and teenagers and adults whose immunity has faded.
Deaths associated with whooping cough are rare but most commonly occur in infants. That's why it's so important for pregnant women — and other people who will have close contact with an infant — to be vaccinated against whooping cough.
Symptoms
Once you become infected with whooping cough, it takes about seven to 10 days for signs and symptoms to appear, though it can sometimes take longer. They're usually mild at first and resemble those of a common cold:
Runny nose
Nasal congestion
Red, watery eyes
Fever
Cough
After a week or two, signs and symptoms worsen. Thick mucus accumulates inside your airways, causing uncontrollable coughing. Severe and prolonged coughing attacks may:
Provoke vomiting
Result in a red or blue face
Cause extreme fatigue
End with a high-pitched "whoop" sound during the next breath of air
However, many people don't develop the characteristic whoop. Sometimes, a persistent hacking cough is the only sign that an adolescent or adult has whooping cough.
Infants may not cough at all. Instead, they may struggle to breathe, or they may even temporarily stop breathing.
When to see a doctor
Call your doctor if prolonged coughing spells cause you or your child to:
Vomit
Turn red or blue
Seem to be struggling to breathe or have noticeable pauses in breathing
Inhale with a whooping sound
Source: www.mayoclinic.org
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