Cách sử dụng
Cowpox is a disease that affects cows, but it can also be spread to humans. It is a mild illness that causes blisters and a fever. Cowpox was once used to create a vaccine for smallpox, a much more serious disease that has been eradicated globally. Nowadays, cowpox is rare, and most people are vaccinated against both smallpox and cowpox. Cowpox is used mostly in medical and scientific contexts.