Smallpox is an infectious disorder caused by two viral variants named Variola major and Variola minor. This infectious disease is manifested by maculopapular rash and elevated fluid-filled blisters. Other symptoms may include high fever.
Severe back and abdominal pain
Smallpox vaccination within three days of exposure will significantly lessen the severity of smallpox or even prevent it. Antiviral drugs are also used for treatment.