Smallpox vaccination revisited. Some observations on the biology of vaccinia.
Sixty-two volunteers were studied to determine their local cutaneous, serologic, and virologic reactions to smallpox revaccination. Of 55 subjects available for examination, 45 (82%) had major cutaneous reactions. Subjects over 30 years old were more likely to have a major reaction. An increase in complement-fixing antibody titer was found in 74% of revaccinees with a major reaction. An increase in complement-fixing antibody titer was found in 74% of revaccinees with a major cutaneous reaction and is felt to be the best serologic indicator revaccination did not yield vaccinia virus. Cultures of the vaccination site demonstrated the virus to be present for a mean of 7.8 days (range 0--18 days) which coincided with separation correlate with antibody response. However, subjects vaccinated more than 3 years previously and subjects with major skin reactions shed vaccinia virus for longer periods than those vaccinated less than 3 years previously or who had equivocal reactions.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001769:Blood / Q000382:microbiology; D003168:Complement Fixation Tests; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D009500:Neutralization Tests; D010614:Pharynx / Q000382:microbiology; D012900:Smallpox Vaccine / Q000009:adverse effects; D013997:Time Factors; D014556:Urine / Q000382:microbiology; D014611:Vaccination / Q000009:adverse effects; D014616:Vaccinia virus / Q000276:immunology / Q000302:isolation & purification
D012900:Smallpox Vaccine