Chopra, R LMehta, J N1972-07-012009-06-011972-07-012009-06-011972-07-01Chopra RL, Mehta JN. Assessment of smallpox immunity status in Haryana state by scar survey 1970. Indian Journal of Public Health. 1972 Jul; 16(3): 123-30http://imsear.searo.who.int/handle/123456789/109519engAdolescentChildChild, PreschoolCicatrixHumansImmunity, ActiveIndiaInfantInfant, NewbornRural PopulationSmallpox --epidemiologyUrban PopulationVaccinationAssessment of smallpox immunity status in Haryana state by scar survey 1970.Journal Article