Serum Institute of India Ltd. is the World's No. 1 producer of Diphtheria, Tetanus, Pertussis, Hib, BCG, r-Hepatitis B, Measles, Mumps and Rubella vaccines. It is estimated that about 65% of the children in the world receive at least one vaccine manufactured by Serum Institute. Vaccines manufactured by the Serum Institute are accredited by the World Health Organization, Geneva and are being used in around 140 countries across the globe in their national immunization programs, saving millions of lives throughout the world. 

Serum Institute of India is ranked as India's No. 1 biotechnology company. Manufacturing specialized life-saving biologicals like vaccines using cutting edge genetic and cell based technologies, antisera and other medical specialties.

Serum Institute of India was founded in 1966 with the aim of manufacturing life-saving immuno-biologicals, which were in shortage in the country and imported at high prices. Thereafter, several life-saving biologicals were manufactured at prices affordable to the common man and in abundance, with the result that the country was made self-sufficient for Tetanus Anti-toxin and Anti-snake Venom serum, followed by DTP (Diphtheria, Tetanus and Pertussis) group of Vaccines and then later on MMR (Measles, Mumps and Rubella) group of vaccines.

The Philanthropic philosophy of the company still not only exists but has been proliferated to bring down the prices of newer vaccines such as Hepatitis-B vaccine, Combination vaccine etc., so that not only Indian's, but the entire under-privileged children of the world are protected from birth onwards.