The real-world findings suggest the shot could seriously reduce asymptomatic transmission.
It's also introducing a strike system that can lead to permanent account suspension.
He says Americans should be hopeful but not complacent.
It's a partial reversal from Facebook's previous position on vaccine misinformation.
But older Americans are most likely to die.
Doubling down on control measures would help — but the will is lacking.
Viruses mutate and evolve and the coronavirus is no different.
A new study suggests the universe is 13.77 billion years old, and a cosmic controversy grows.
There's no evidence yet that vaccines "prevent people from actually getting the infection," official warns.
Adults over 75 are eight times more likely to be hospitalized after contracting the virus.