President Joe Biden said experts are studying any necessary changes to masking guidance and will ‘follow the science’ as the more contagious Delta variant of the coronavirus sweeps the United States. #Coronavirus #Biden #CDC #News #Reuters #MaskGuidance #COVID19 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