Daily coronavirus cases in India have topped 100,000, the most so far.
India confirmed over 103,000 new infections on Monday.
The western state of Maharashtra reported more than half of them and has stepped up countermeasures.
The government in India's richest state has imposed a nighttime curfew and weekend lockdowns from Monday through the end of April.
Cases in India have rebounded since late February.
The central government says the country has entered the second wave of infections.
India's vaccination program started in January, but only about 5 percent of the country's 1.3 billion people have had their first shot.
Last week, the government expanded eligibility for the jab to include those aged 45 or older.
Neighboring Bangladesh is also struggling with a sharp rise in cases. The government began a one-week nationwide lockdown on Monday after a record number of daily infections was reported.