:The Company's principal activity is to manufacture and supply of oral polio vaccine. It supplies oral polio vaccine to Government of India. Its plant is located in Bulandshahr, Uttar Pradesh.The live oral polio vaccine (OPV) is a trivalent vaccine containing suspensions of type 1,2 and 3 attenuated poliomyelitis viruses (Sabin strains) prepared in primary moneky kidney cell culture. Each dose contains Poliovirus type 1 = 106.0Poliovirus type 2 = 105.0Poliovirus type 3 = 105.