A proposed potency test for smallpox vaccine.  I.  Evaluation of chick embryo LD50 method.
D000818:Animals; D002642:Chick Embryo; D006801:Humans; D007928:Lethal Dose 50; D012899:Smallpox; D012900:Smallpox Vaccine; D012901:Variola virus
D012900:Smallpox Vaccine
SMALLPOX/virus