On Tuesday, India passed 20 million confirmed cases of corona infection.
Now health experts warn that the numbers may be significantly higher than that, according to the news agency AFP.
The lack of oxygen has been acute for a while and the situation is desperate in several places in the country with overcrowded hospitals.
The giant city of Delhi has been forced to build makeshift crematoria to deal with all the dead bodies.
The number of new cases on a daily basis has slowed somewhat in recent days, from the peak of 402,000 on Friday.
However, it is too early to say whether this is a real reduction in infection or whether it is due to a lack of test capacity.
See more from India in the clip above.