Lab studies show that the mutations found in COVID-19’s Delta variant make the virus more resistant to existing vaccines, a potentially ominous development as the new Omicron variant starts to wend its way around the world. Full...

Most vaccinated American adults have every intention of getting booster shots, a new poll finds. Only about one in five say they won’t get it, according to a Kaiser Family Foundation (KFF) survey conducted with 1,820 U.S....

A genetic test can identify older breast cancer patients who can forgo chemotherapy after surgery, even if the cancer has spread to nearby lymph nodes, a large international clinical trial shows. “For decades, women with breast cancer...

Nearly 13 million U.S. adults a year skip or delay filling needed prescriptions due to high price tags, new research shows. This figure includes more than 2.3 million Medicare beneficiaries and 3.8 million privately insured working-age adults...

COVID-19 lockdowns brought surprising news to scientists studying pollution: Cars spew much more ammonia into the air than previously thought. Ammonia is a common air pollutant that’s a major cause of lung and heart disease, especially in...

If you’re getting together with others outdoors, a windy day might be best, researchers say. The investigators found that when people socialize outside, the risk of coronavirus infection is as much as 45% greater when there’s hardly...

Just one day after the first Omicron case was reported in the United States, federal officials announced a second case on Thursday, this time in a Minnesota man who had traveled to an Anime convention in New...

Autism may be more prevalent among American children than believed, a new U.S. government study shows. One in 44 children at age 8 in the United States have been diagnosed with the developmental disorder, a jump from...

Children and teenagers vaccinated against the mumps virus have accounted for one-third of infections in recent years, a new U.S. government study finds. The reasons are unclear, and experts stressed that routine childhood vaccination remains the best...

College students are not bouncing back from the changes brought on by the COVID-19 pandemic, a troubling new study finds. Researchers were surprised to find that one year after the start of the pandemic, college students were...