From smallpox to polio and beyond: disease surveillance in India.
Heymann
David L
DL
World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland. heymannd@who.int
D003140:Communicable Disease Control; D006801:Humans; D007194:India / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011159:Population Surveillance; D012899:Smallpox / Q000453:epidemiology / Q000517:prevention & control*