For most people, COVID-19 vaccines promise a return to something akin to normal life. But for the hundreds of thousands of Americans who have a transplanted organ, it's a different story.

Using two different COVID-19 vaccines is a bit like giving the immune system two pictures of the virus, maybe one face-on and one in profile.

Ecologist Suzanne Simard says trees are "social creatures" that communicate with each other in remarkable ways — including warning each other of danger and sharing nutrients at critical times.

All the singers in this U.K. choir have undergone laryngectomies — voice box removal — to treat cancer. Singing builds lung strength, and performing together builds confidence, choir members say.

An experimental medicine seems to ease symptoms of Fragile X syndrome, a genetic disorder that is the most common inherited cause of intellectual disabilities and autism.

As the number of people seeking therapy soars during the pandemic, CVS has begun testing a model to offer counseling services in its stores. It hopes to reduce costs for both patients and itself.

Researchers are trying to come up with tests that can be performed using a blood sample that will determine not only whether a COVID-19 vaccine will work but also for how long.

Biologists say newly efficient and accurate gene sequencing techniques have allowed them to fairly quickly detail full genomes and find overlooked genes in a broad range of 25 important species.

Live-tweeting your fever and body aches after your second shot is the ultimate humble-brag of 2021. But does it really matter to immunity if you have a strong reaction to the COVID-19 vaccine?

As a doctor, I was eligible for the COVID-19 vaccine in December, but I also was pregnant, and there wasn't yet much data to inform my decision. What I needed was a different kind of information.

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

Drugs that can help keep COVID-19 patients out of the hospital are playing only a small role in Michigan, where the pandemic is accelerating. Logistical challenges are to blame.

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.

Government health officials are recommending a "pause" in vaccinations with the Johnson & Johnson COVID-19 vaccine. We're answering your questions as we learn more.

Researchers are reporting some progress in their search for drugs that tamp down the overwhelming immune reaction that can kill a patient with COVID-19.