Cách sử dụng
Smallpox is a disease that used to be very common, but now it has been completely eradicated (or eliminated) through vaccination. It causes fever and a rash with fluid-filled blisters all over the body. If someone has smallpox, they should be isolated (or kept away from others) to prevent it from spreading. The word 'smallpox' can be used in the context of history, medicine, or public health discussions.