Human to human transmission is possible in orthopoxviruses.
Shah
Pramod M
PM
D000293:Adolescent; D000328:Adult; D000818:Animals; D000829:Animals, Domestic / Q000821:virology*; D015605:Cowpox / Q000175:diagnosis / Q000635:transmission* / Q000662:veterinary* / Q000821:virology; D015608:Cowpox virus / Q000302:isolation & purification*; D005260:Female; D006801:Humans; D008297:Male; D051381:Rats; D012376:Rodent Diseases / Q000175:diagnosis* / Q000635:transmission* / Q000821:virology; D055815:Young Adult