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Pertussis, also known as whooping cough, is an extremely contagious bacterial infection. It can cause serious respiratory illness in people of all ages but is most dangerous for babies. Learn About Pertussis. Even if you have all of the signs and symptoms of pertussis, your doctor will likely order a laboratory test to confirm it.

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Jun 03,  · What is whooping cough? Whooping cough can be a life threatening infection in babies. Whooping cough in babies can lead to apnoea (pauses in normal breathing), pneumonia, feeding problems and weight loss, seizures, brain damage and, in some cases, death. Older children and adults can get whooping cough too and pass it on to babies.