Question

had whooping cough am i immune

Answer 1

Having a single attack of whooping cough does not provide complete lifelong immunity to the disease, but a second attack, if it occurs, is mild and may not always be diagnosed as a whooping cough. In fact, some adults with "walking pneumonia" actually have whooping cough.

A patient with whooping cough bacteria spreads disease-causing bacteria into the air with cough droplets. Anyone close to them inhaling these droplets can become infected. Whooping cough is often not contagious after the third week of infection.