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Pertussis is caused by a type of bacteria called Bordetella pertussis. The disease is highly contagious. The bacteria spread easily through the air from person to person through tiny drops of fluid from an infected person’s nose or mouth. When an infected person sneezes or coughs others can become infected when they inhale the drops or get the drops on their hands and then touch their mouths or noses.


Back to Pertussis (Overview)