The two HIV prevention drugs available in the United States are equally safe and effective, and the biggest difference between them is price, a new study contends. However, a sizable minority of patients have switched from the older and cheaper “preexposure prophylaxis” (PrEP) formulation to the newer and much pricier one. In many cases that…  read on >  read on >

U.S. gun sales increased early in the COVID-19 pandemic, and many of those firearms ended up in homes with teens, researchers say. “This finding is concerning because we know that the single biggest risk factor for adolescent firearm injuries is access to an unsecured firearm,” said study co-author Dr. Patrick Carter. He is co-director of…  read on >  read on >

Wealthy nations shouldn’t be giving COVID-19 vaccine booster shots to their citizens while poor nations struggle to get first doses of vaccines, the World Health Organization (WHO) said Wednesday. The U.N. health organization called for a moratorium on booster shots until at least the end of September, even for the elderly, health care workers and…  read on >  read on >

Exactly what symptoms of early COVID-19 infection you suffer may depend on both your age and gender, a new study finds. “As part of our study, we have been able to identify that the profile of symptoms due to COVID-19 differs from one group to another. This suggests that the criteria to encourage people to…  read on >  read on >

Air pollution could cause sinus misery, new research suggests. Specifically, tiny particulate air pollution (known as PM2.5) could contribute to chronic rhinosinusitis, a condition in which the sinuses get infected or irritated, become swollen, are severely congested and secrete mucus into the throat for 12 weeks or more. “To our knowledge, this is the first…  read on >  read on >