It achieved the feat in 85 days, whereas the US took 89 days and China 102 days, the health ministry said.
But the country reported a record daily increase of over 150,000 cases - and more than 800 new deaths - on Sunday. And there are reports the vast vaccination drive itself is struggling.
This week, half a dozen states reported a shortage of doses even as the federal government insisted that it had 40 million doses in stock and that the "allegations" of vaccine scarcity were "utterly baseless".
The inoculation drive aims to cover 250 million people by July, but experts say the pace needs to pick up further to meet the target.
Read More at : https://www.bbc.com/news/world-asia-india-56345591