President Biden answers a question about masks and vaccines. https://www.forbes.com/sites/carlieporterfield/2021/07/21/study-finds-pfizer-and-astrazeneca-vaccines-effective-against-the-delta-variant---as-long-as-you-get-both-doses/?sh=40bd5c73480b Stay Connected Forbes on Facebook: http://fb.com/forbes Forbes Video on Twitter: http://www.twitter.com/forbes Forbes Video on Instagram: http://instagram.com/forbes More From Forbes: http://forbes.com