Effect of the diluent on the pock count of vaccinia virus dilutions.
D000818:Animals; D002642:Chick Embryo; D046508:Culture Techniques; D003588:Cytopathogenic Effect, Viral / Q000187:drug effects*; D005321:Extraembryonic Membranes; D008892:Milk; D012900:Smallpox Vaccine / Q000592:standards; D013501:Surface-Active Agents / Q000494:pharmacology*; D013997:Time Factors; D014357:Trypsin / Q000494:pharmacology; D014465:Ultrasonics; D014616:Vaccinia virus / Q000187:drug effects / Q000472:pathogenicity*
D012900:Smallpox Vaccine; D013501:Surface-Active Agents; D014357:Trypsin