Masks are making an unwanted comeback in many parts of the United States, after new data showing that fully vaccinated people with “breakthrough” coronavirus infections carry enough virus in their bodies to pose a potential risk to the unvaccinated. But these breakthrough infections — which have become slightly more common with the highly transmissible Delta…  read on >  read on >

The U.S. Food and Drug Administration on Thursday authorized a third “booster” shot of coronavirus vaccines for people with weakened immune systems, as the highly contagious Delta variant continues to surge across the country. Expanding the emergency use of the Pfizer and Moderna vaccines should help protect those patients who are considered most vulnerable to…  read on >  read on >

Here’s an unexpected benefit from wearing a mask during the pandemic: It may also reduce fall allergy symptoms, one expert says. “Masks that people use for protection from COVID-19, particularly those that filter out more particles like the N95 or KN95 masks, also tend to filter out pollen,” said Dr. Luz Fonacier, president of the…  read on >  read on >

Uncontrolled asthma increases the risk of severe COVID-19, researchers warn. “This study … focused on how COVID-19 outcomes might change for asthma patients depending on their level of asthma control,” said study author Anny Xiang, a senior research scientist at Kaiser Permanente Southern California. “We also saw that even in patients with active asthma, if…  read on >  read on >

Black American liver transplant recipients have a lower survival rate than Hispanic or white patients, and a new study suggests that alcohol-related liver disease and insurance coverage are key reasons. “Our findings are a huge wake-up call that physicians and other health care professionals need to do better in delivering equitable care,” said study leader…  read on >  read on >

Widowers have a higher risk for advanced prostate cancer than men who are part of a couple, Canadian researchers say. The new findings are from an analysis of 12 studies comparing 14,000 men newly diagnosed with prostate cancer and 12,000 healthy men. The study — recently published in the European Journal of Epidemiology — suggests…  read on >  read on >