A further collaboration among the Serum Institute of India (SII), the world's largest vaccine manufacturer by volume, Gavi and the Bill and Melinda Gates Foundation will accelerate the manufacture and delivery of up to 100 million doses of safe and effective Covid-19 vaccines for India and low-and middle income countries.

This brings the total number of vaccine doses to be covered by the partnership between SII, Gavi, and the Gates Foundation to an aggregate of up to 200 million doses, following the initial agreement for up to 100 million doses announced in August.