NEW DELHI — India on Monday reported nearly 20,000 new coronavirus infections, a new record for the country, as several states reimpose partial or full lockdowns to stem the spread of the virus.

India has seen a jump of nearly 100,000 cases over the past week, the health ministry said. In all, the country has confirmed 548,318 cases, making it the world’s fourth-worst affected country after the United States, Brazil and Russia. India’s death toll has reached 16,475.

The capital district of the northeastern state of Assam on the Bangladesh border has reimposed a full lockdown until July 12 following a spike in cases. Another border state, West Bengal, has extended its lockdown until July 31.

However, in India’s worst-affected states — Maharashtra, which includes India’s financial capital, Mumbai, and Delhi, home to the capital, New Delhi — most lockdown restrictions have been eased, with restaurants, shopping malls and parks reopened, and public buses and shared-ride services back on the roads.