Assessing vaccine efficacy in the field. Further observations.
Orenstein
W A
WA
Division of Immunization, Centers for Disease Control, Atlanta, GA 30333.
Bernier
R H
RH
Hinman
A R
AR
D004812:Epidemiologic Methods; D006801:Humans; D011358:Product Surveillance, Postmarketing / Q000379:methods*; D014611:Vaccination; D014612:Vaccines / Q000592:standards*
D014612:Vaccines