Biden has been campaigning from a home TV studio since the coronavirus pandemic made traditional rallies and events impossible.
Ronald Klain, Biden's chief of staff during the Obama administration and White House Ebola response coordinator from 2014-2015, criticized Hume for his tweets. With the help of rapid coronavirus testing equipment in the White House, Trump and Vice President Mike Pence have traveled the country - often to key swing states - for official White House events. Biden previously wore a mask during a television appearance.
Trump threatens to move RNC out of North Carolina over coronavirus restrictions
Baker said then that GOP officials had discussed convention alternatives but did not elaborate. In March, Cooper issued an executive order banning gatherings of more than 100 people.
"Such a shameful and embarrassing post".
Meanwhile, US President Donald Trump and his wife Melania also took part in a wreath-laying ceremony as part of Memorial Day commemorations on Monday.
In a visit to a Ford factory in MI last week Trump was pictured not wearing a mask, though stated he had had done so in an area not accessible to the press.
World Health Organization suspends hydroxychloroquine trial over safety concerns
It comes after a recent medical study suggested the drug could increase the risk of patients dying from Covid-19. This is an effort overseen by the World Health Organization to find new treatments for COVID-19.
Biden, the prospective Democratic presidential nominee, and his wife, Jill, both wearing black masks, laid a wreath of white roses at the memorial for US military personnel who fought in World War Two and the Korean War. They each wore face coverings during their visit. But he has not been seen in public.
The Centers for Disease Control and Prevention (CDC) recommends wearing a face mask in settings in which social distancing is hard.
The state of DE has urged people to "wear face coverings in public settings" to slow the spread of the coronavirus. He proceeded to demonstrate while reminding viewers that wearing masks is so people can protect themselves from contracting the virus or spreading it to others.
Although COVID-19 cases have dipped overall for the USA, the spread of the virus has changed from urban to rural areas, according to a Washington Post analysis. Biden himself later said he should not have been so cavalier with the comments and that he wasn't taking the black vote for granted.
COVID-19 vaccine: What’s the latest on this front?
CEPI's funding is also meant to support the transfer of NVX-CoV2373 technology to manufacturing partners worldwide. Moderna Inc. reported the first Covid-19 vaccine results in humans last week.