A FIELD TRIAL OF TISSUE CULTURE SMALLPOX VACCINE.
D000818:Animals; D002642:Chick Embryo; D002648:Child; D004739:England; D006801:Humans; D007223:Infant; D012107:Research Design; D012900:Smallpox Vaccine; D013223:Statistics as Topic; D046509:Tissue Culture Techniques; D014776:Virus Cultivation
D012900:Smallpox Vaccine
CHICK EMBRYO; CHILD; ENGLAND; INFANT; SMALLPOX VACCINE; STATISTICS; TISSUE CULTURE; VIRUS CULTIVATION