A SMALLPOX IMMUNITY SURVEY AT A  LARGE INTERNATIONAL AIRPORT.
D000337:Aerospace Medicine; D059028:Airports; D003625:Data Collection; D006801:Humans; D008404:Massachusetts; D012899:Smallpox; D012900:Smallpox Vaccine; D012901:Variola virus
D012900:Smallpox Vaccine
AVIATION MEDICINE; MASSACHUSETTS; SMALLPOX VACCINE