Whooping cough is a highly contagious infection of the respiratory passages caused by the Bordetella pertussis bacterium. The initial symptoms are mild, but they slowly advance to severe coughing that ends with a deep breath (the ‘whoop’ sound) and it can last for months. Contrary to old beliefs, it is not a disease of childhood, Related posts:

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Originally posted here: 
Whooping cough vaccine ineffective after 3 years