President Trump called the CDC guidelines too tough and threatened to cut federal funding to schools that wouldn't reopen in the fall. Can he do that?
How the COVID-19 pandemic is affecting every state
The Centers for Disease Control and Prevention is revising its guidance on schools after Trump tweeted his disagreement with them, Pence said.
The World Health Organization rejects US criticism it mishandled the early days of the coronavirus outbreak.
Though masks don't provide full protection, health officials urge the public to wear them to prevent virus spread.