what is smallpox
Smallpox is a serious infectious disease caused by the Orthopox virus, variola. The last case in Vermont occurred in 1937, and there have been no confirmed cases worldwide since eradication was achieved in 1978.A single case today would be considered a national public health emergency.mallpox is a serious infectious disease caused by the Orthopox virus, variola. The last case in Vermont occurred in 1937, and there have been no confirmed cases worldwide since eradication was achieved in 1978.