FDA chief Stephen Hahn has said that 20million Americans could be vaccinated this year.
The US Food and Drug Administration head said he was 'very hopeful' and that the administration would move 'very quickly'.
It comes after Donald Trump reportedly summoned the head of the FDA to pressure him to authorise a coronavirus vaccine for emergency use.
Trump summons FDA chief to demand FASTER vaccine approval as Fauci says American pharmacies will be stocked by April
From Brexit breaking news to HD movie trailers, The Sun newspaper brings you the latest news videos and explainers from the UK and around the world.
Become a Sun Subscriber and hit the bell to be the first to know
Read The Sun: www.thesun.co.uk
Like The Sun on Facebook: www.facebook.com/thesun/
Follow The Sun on Twitter: twitter.com/TheSun
Subscribe to The Sun on Snapchat: www.snapchat.com/discover/The_Sun/1633225139