"Our vaccination programme is robust and valid, and I assure you that we are going ahead with it, not worried at the moment," Vinod Kumar Paul, a top Indian vaccine official, told a news conference.
"We will intensify our surveillance and we will be watching other developments in due course."
The Serum Institute of India (SII), the world's biggest vaccine maker, has licenced the vaccine from AstraZeneca and Oxford University and markets it as COVISHIELD for low-and middle-income countries.
India has ordered 10 million more doses of COVISHIELD on top of 11 million supplied earlier, an SII spokesman told Reuters on Tuesday. SII has agreed to sell at least 100 million doses to the government at a discounted price of 200 rupees ($2.74) each, though the government says firm orders will be staggered based on its needs, and also on vaccine shelf-life.