COVID-19 Weekly Update: August 23

Cases of reinfection, questionable testing guidelines and more on plasma therapy — catch up on this week's COVID-19 news with Live Science! Hong Kong reinfection: https://www.livescience.com/coronavir... US reinfection: https://www.livescience.com/coronavir... Testing guidelines: https://www.livescience.com/cdc-covid... Plasma: https://www.livescience.com/fda-issue... Science News • Videos • Explainers SUBSCRIBE to the Live Science YouTube channel → http://www.shorturl.at/fzCV5 Twitter→   / livescience   Facebook→   / livescience   Instagram→   / live_science   Community Forums→ https://forums.livescience.com/ For the science geek in everyone, LiveScience.com breaks down the stories behind the most interesting news and photos on the Internet, while also digging up fascinating discoveries that hit on a broad range of fields, from dinosaurs and archaeology to wacky physics and astronomy to health and human history. If you want to learn something interesting every day, #LiveScience is the place for you.