Sukumaran, P KMaster, H RUndevia, J VBalakrishnan, VSanghvi, L D1966-02-012009-05-291966-02-012009-05-291966-02-01Sukumaran PK, Master HR, Undevia JV, Balakrishnan V, Sanghvi LD. ABO blood groups in active cases of smallpox. Indian Journal of Medical Sciences. 1966 Feb; 20(2): 119-22http://imsear.searo.who.int/handle/123456789/69411engABO Blood-Group SystemFemaleHumansIndiaMaleSmallpoxABO blood groups in active cases of smallpox.Journal Article