- Safety and immunogenicity of single dose of tetanus-diphtheria (Td) vaccine among non/partially immune children against diphtheria and/or tetanus, Hyderabad, India, 2007. Bitragunta, S., Murhekar, M.V., Chakravarti, A., Verma, V., Namjoshi, G.S., Parekh, S.S., Sharma, H.J., Kumar, B.K., Gupte, M.D. Vaccine (2010)