Rob Stein

New coronavirus cases are at their lowest level since October. Some health experts think the vaccination campaign deserves credit for tamping down the U.S. outbreak. But will the downturn last?

The U.S. appears to be very close to hitting a tipping point in the coronavirus pandemic, with vaccinations finally turning around the trajectory of infections.

The U.S. has entered a precarious limbo period in the pandemic, with the nation teetering on the edge of a tipping point to win the battle against the virus, or succumbing to yet another deadly surge.

With a more contagious variant now dominant in the U.S., the country's genomic surveillance capacity is getting a major boost.

An international team has put human cells into monkey embryos in hopes of finding new ways to produce organs for transplantation. But some ethicists still worry about how such research could go wrong.

COVID-19 vaccines are highly effective but don't always provide perfect protection. Some vaccinated people later exposed to the virus still get sick. Why and how often that happens is under study.

The variant known as B.1.1.7, which is more easily spread, was first identified in England last fall. Since then, it has spread quickly in the U.S.

President Biden has announced that the deadline for every adult to be eligible for a COVID-19 vaccine has moved from May 1 to April 19.

The answer, experts say, depends on how Americans behave in the next several weeks and how quickly vaccines get in arms.

CDC Director Rochelle Walensky issued a stark and emotional warning of "impending doom" as infections, hospitalization and deaths rise, fueling fears of yet another deadly surge.

COVID-19 infections are rising in the Midwest and Northeast, and hospitalizations have started climbing in at least a dozen states, fueling fears of another surge linked to Easter and spring break.

Many public health experts are now increasingly optimistic about how the pandemic is playing out in the U.S. Here's what they say we can expect for the rest of 2021.

Public health experts are getting increasingly concerned that new COVID-19 hot spots may be emerging, especially in Michigan.

These structures made from living human cells are similar to human embryos at the stage when they implant in the womb. They allow scientists to research new ways to treat infertility.

Could the end of the pandemic be in sight in the U.S.? A growing number of the nation's leading experts say: Yes, with some caveats. Variables could still derail the recovery.

Scientists are spotting new coronavirus variants almost on a daily basis. So far public health experts are still most worried about three important ones.

The CDC is warning that the recent improvement in COVID-19 case numbers might be stalling. Variants of the virus may be starting to spread widely in this country, which could reverse recent progress.

Variants of the coronavirus have scientists in a scramble to assess the threat and prevent more surges. Meanwhile, vaccine manufacturers are looking at developing booster shots to address variants.

Scientists have spotted yet another potentially worrisome coronavirus variant, a strain that has a mutation that may help it evade vaccines, and seems to be spreading fast in New York City.

A 95-year-old man who's been living in Tennessee was deported to Germany to face authorities over his work as a camp guard. Friedrich Karl Berger has lived in the United States since 1959.