Joe Biden challenges Americans to 'mask up' for first 100 days – video

Joe Biden has urged Americans to wear face masks for 99 days as part of a challenge for his first 100 days in office during a speech on Thursday in which he unveiled his administrations's national Covid strategy.

Biden signed an executive order to mandate face coverings during interstate travel and within federal buildings as he noted the US coronavirus death toll is higher than that from the second world war.