The White House has been under pressure from lawmakers at home and governments abroad to join an effort to waive patent rules for the vaccines so that poorer countries can begin to produce their own generic versions of the shots.

The government has been using the railroad, the air force and the navy to rush oxygen tankers to worst-hit areas.

As daily coronavirus case counts in India soar far beyond what other countries have reported, experts caution the official COVID-19 numbers from the world’s second most populous country are likely a massive undercount.

April was Brazil’s deadliest month of the pandemic, with thousands of people losing their lives daily at crowded hospitals.