The United States is working to give additional COVID-19 booster shots to Americans with compromised immune systems as quickly as possible, as cases of the novel coronavirus continue to rise, top U.S. infectious disease expert Dr. Anthony Fauci said Thursday. #Covid #DeltaVariant #Coronavirus #CDC #Fauci #News #Reuters Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en