Pertussis is  Highly Contagious but Preventable. It is a vaccine-preventable disease that is spread through the air by infectious respiratory droplets. It is caused by a bacterium called Bordetella pertussis, which is found in the mouth, nose and throat of the person infected with the disease. The milder form of the disease, which usually occurs in … Continue reading Is Pertussis (Whooping Cough) a Serious Threat?