Many people have a small, round scar on their upper arm, a lasting mark from the smallpox vaccine, which was commonly given before the 1970s. This vaccine used the live Vaccinia virus to create immunity against the deadly Variola virus, the cause of smallpox.
Many people have a small, round scar on their upper arm, a lasting mark from the smallpox vaccine, which was commonly given before the 1970s. This vaccine used the live Vaccinia virus to create immunity against the deadly Variola virus, the cause of smallpox.
