The enigma of poxviruses.
D000818:Animals; D004197:Disease Reservoirs; D000882:Haplorhini; D006801:Humans; D011212:Poxviridae / Q000145:classification* / Q000235:genetics; D011213:Poxviridae Infections / Q000382:microbiology; D012899:Smallpox / Q000517:prevention & control; D013045:Species Specificity