Pfizer and German partner BioNTech said on Friday the U.S. government has purchased 200 million additional doses of their COVID-19 vaccine to help with pediatric vaccination as well as possible booster shots - if they are needed. #DeltaVariant #Pfizer #Biontech #COVID19 #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