Dirty air could cancel out some of the brain benefits of exercise, a new study suggests. “Physical activity is associated with improved markers of brain health in areas with lower air pollution,” said study author Melissa Furlong. “However, some beneficial effects essentially disappeared for vigorous physical activity in areas with the highest levels of air…  read on >  read on >

Booster doses of Pfizer’s coronavirus vaccine set recipients up to effectively withstand the ravages of both the Delta and Omicron variants, a group of new studies suggest. Boosted folks are 90% less likely to die from a Delta infection than people relying solely on the initial two-dose vaccination, Israeli data show. That protection will be…  read on >  read on >

People who get cochlear implants to treat severe hearing loss may develop new bone growth in the ear — and it may lessen any hearing they have left, a new study hints. The researchers found that among 100-plus adults with cochlear implants, two-thirds showed evidence of new bone formation near the implant within four years.…  read on >  read on >

First, the COVID-19 pandemic brought panic, with successive waves of infection and death, including the emergence this year of the Delta variant. Then vaccines offered the promise of a recovery, with a speed — and on a scale — never before seen. But now, the Omicron variant is sending Americans on another emotional roller-coaster ride…  read on >  read on >

Right now, the devastating concussion-linked brain condition known as chronic traumatic encephalopathy (CTE) can only be diagnosed after death via autopsy. But new research could help change that, allowing doctors to someday spot the illness earlier. According to the new study, MRI may be able to detect CTE while people are still alive. “While this…  read on >  read on >

The pandemic has intensified mental health struggles that were already widespread among American teens, U.S. Surgeon General Dr. Vivek Murthy warned Tuesday. The pandemic and other major issues faced by their generation are causing “devastating” mental health effects in young people, he warned in a new report. Emergency room visits for suicide attempts by adolescent…  read on >  read on >

Can the time of day you get your COVID-19 vaccine affect how many antibodies you’ll make? A new study suggests that it can. Researchers found higher antibody levels in health care workers who received their vaccines in the afternoon, and they suggest that response to the vaccine may be affected by circadian rhythms. “Our observational…  read on >  read on >