Cowpox

Cowpox is an infection caused by the virus, cowpox virus, which sometimes affects humans and other animals. The virus is closely related to the virus that causes smallpox, although the symptoms of cowpox are usually milder and less severe than those of smallpox. Cowpox is of historical significance, as it was the first virus to be used for a vaccine. It was used as a vaccine for smallpox in 1800 by Edward Jenner and is still used in some parts of the world. In modern times, cowpox is of importance in the research field as it is useful for understanding the immune system and diseases caused by viruses.