Nurith Aizenman

It's one of the hottest areas of COVID-19 research: How well do the various vaccines work against the variants? New findings are coming out daily. Here's what's known so far, and what's pending.

For this health expert based in Boston, the effort to get vaccines to his native South Africa was intensely personal.

South Africa is a case study of the inequities around the coronavirus vaccine. It has one of the world's worst outbreaks, fueled by a new variant. Yet officials are struggling to buy enough vaccines.

New results from a COVID-19 vaccine trial in South Africa suggest the vaccine that was developed by AstraZeneca may not be as effective against the variant found there.

New research shows how official figures understate the U.S. pandemic: On any given day the number of infected people who are actively contagious is ten times that day's tally of new reported cases.

One year ago on Thursday, China notified the World Health Organization that it had discovered a new coronavirus circulating in Wuhan. NPR discusses what happened after that.

A new study suggests kids in poor countries benefit hugely from having older sisters — who are more likely than brothers or even mothers — to engage in stimulating play.

As the U.S. enters the most challenging phase of the pandemic to date, states are reimposing different kinds of mitigation measures. This time around, experts are offering a wider range of solutions.

Coronavirus cases are surging in many countries, including the United States and in Europe, and governments are imposing new lockdowns. NPR takes a look at the state of the pandemic around the world.

The world is nearing a million deaths from COVID-19 — with almost every nation having lost people to the disease. And in the five countries hit badly by the pandemic, the trend remains worrisome.