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European Journal of Epidemiology|November 15, 2000
Herd immunity and herd effect: new insights and definitionsT J John, R SamuelInternational Journal of Epidemiology|December 1, 1993
Factors affecting immunization coverage levels in a district of IndiaV Balraj, S Mukundan, R Samuel, et al.Lancet (London, England)|November 4, 1998
Disease surveillance at district level: a model for developing countriesT J John, R Samuel, V Balraj, et al.Public Health Reviews|January 1, 1993
Experience with poliovaccines in the control of poliomyelitis in IndiaT J JohnAmerican Journal of Epidemiology|November 1, 1975
Oral polio vaccination of children in the tropics. II. Antibody response in relation to vaccine virus infectionT J JohnReviews of Infectious Diseases|May 1, 1984
Poliomyelitis in India: prospects and problems of controlT J JohnJournal of Postgraduate Medicine|December 8, 2005
The prevention and control of human leptospirosisT J JohnDevelopments in Biological Standardization|January 1, 1996
Vaccine stability in the context of vaccine delivery in a developing country: IndiaT J JohnPageof 35