questions about smallpox

World events are raising questions about smallpox.

Incubation time after exposure is about 2 weeks. First symptoms are like a severe flu. Patients become contagious 2 to 4 days later when they get mouth sores and a rash on their face and body.

Contagiousness is LESS than chickenpox, measles, or flu. It takes several hours of close contact with an infected person to get the virus. It's spread through aerosolized droplets.

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