Huo Jingnan

More widespread wearing of face masks could prevent tens of thousands of deaths by COVID-19, epidemiologists and mathematicians project.

Of the world's 20 poorest states, the Democratic Republic of the Congo spends the least per citizen on health care — $19 per person annually.

And in Sierra Leone, the highest health spender among those states south of the Sahara, it's over triple — $66 per capita.

That's still just a fraction of how much the world's wealthiest countries spend on each of their residents' health. In the United States, the number is nearly $10,000. Half of the 20 richest countries spend at least $5,000 per person.

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With traffic dramatically down in recent months, the United States is in the middle of an accidental experiment showing what happens to air pollution when millions of people stop driving.

A bipartisan group of lawmakers is demanding answers from the Treasury Department and the IRS about improper coronavirus relief checks paid out to deceased taxpayers.

There's one thing that distinguishes the nursing homes in New York that have reported patient deaths from COVID-19. According to an NPR analysis, they are far more likely to be made up of people of color.

NPR looked at 78 nursing homes in New York in which six or more residents have died of COVID-19. In one facility, 55 people have died as of April 20. Ten others report 30 or more deaths.