Where Does Pneumonic Plague Come from?

Pneumonic plague occurs when Y. pestis infects the lungs. This type of plague can spread from person to person through the air. Transmission can take place if someone breathes in aerosolized bacteria, which could happen in a bioterrorist attack.

How is pneumonic plague spread between humans?

Infectious droplets.

If these bacteria-containing droplets are breathed in by another person they can cause pneumonic plague. Typically this requires direct and close contact with the person with pneumonic plague. Transmission of these droplets is the only way that plague can spread between people.

How is pneumonic plague prevented?

Preventing infection

Avoid close contact with sick people, particularly with anyone who may have plague. It is safe to have contact after the case has completed a course of prescribed antibiotics. Avoid crowded areas where cases of pneumonic plague have been recently reported.