Joe Biden, at his first press conference in three months, defended his cognitive ability and said he “can hardly wait” to compare it to President Trump's as the general election matchup heats up.“I’ve been tested, I’m constantly tested,” Biden said in response to a question from Fox News’ Doug McKelway. “Look, all you’ve got to do is…

WASHINGTON (AP) — The nation’s top health officials are banking on a new approach to dramatically boost U.S. screening for the coronavirus: combining test samples in batches instead of running them one by one.The potential benefits include stretching laboratory supplies, reducing costs and expanding testing to millions more Americans who may unknowingly be spreading the…

Alexander Panis, nurse practitioner at St. John's Well Child and Family Center, prepares a COVID-19 test on Thursday, June 25, 2020, in the Wilmington area of Los Angeles. Alexander Panis, nurse practitioner at St. John's Well Child and Family Center, prepares a COVID-19 test on Thursday, June 25, 2020, in the Wilmington area of Los…

Cone-style well fitting masks and home-made coverings made from multiple fabric layers are the best designs for stopping the spread of coronavirus, study shows.Researchers from Florida Atlantic University examined different materials and designs to find the best option for slowing the spread of virus carrying droplets.These droplets are expelled when someone with COVID-19 coughs or sneezes…

Dr. Danielle Ofri, author of When We Do Harm: A Doctor Confronts Medical Error, says medical mistakes are likely to increase as resource-strapped hospitals treat a rapid influx of COVID-19 patients. Justin Sullivan/Getty Images hide caption toggle caption Justin Sullivan/Getty Images Dr. Danielle Ofri, author of When We Do Harm: A Doctor Confronts Medical Error,…