India has recorded the most number of COVID-19 infections in the past week anywhere in the world.
With daily infections rising about 12 fold since hitting a multi-month low in early February.
Since then authorities eased most restrictions and people largely stopped wearing masks and following social distancing.
The country now reporting a record rise with more than 100,000 new cases in a day.
Some epidemiologists say more infectious variants of the virus may have played a role in the second surge.
India has found hundreds of cases of the virus variants first detected in the UK, South Africa and Brazil.
Hospitals in the worst affected state, Maharashtra, are being overrun by patients.
India's richest state, home to its commercial capital Mumbai and numerous industries, reported a record 57,074 new cases overnight.
Delhi based Doctor Arvind Kumar says something drastic must be done now.
"Let's not blame the new strain for this. It's our COVID(-19) inappropriate behavior which is responsible for this rise so, I think the whole country needs to understand and start practicing it from today. Don't go out of the house unnecessary, avoid closed… people collecting in closed rooms, maintain social distancing and never never step out of your house without a mask."
The rise in cases comes as politicians stage massive election rallies, raising fears of further spreading the virus.
India is the world's biggest maker of vaccines and while it has injected 77 million doses at home since starting its campaign it is lower than many other countries for vaccines per capita.
Including that of more populated China, which started giving shots to its citizens much earlier.
India is currently vaccinating only people above the age of 45, having covered health and front-line workers first.
Officials are discussing raising the country's vaccine output further.
Data from the health ministry shows India has now reported 12.6 million cases, the highest after the U.S. and Brazil.