Travelers to the United States will have to quarantine, and the E.U. is tightening rules regarding its member countries. …
dropping steadily across the United States, with hospitalizations falling in concert. But health officials are growing increasingly concerned that quickly circulating variants of the virus could cause new surges of cases faster than the country is managing to distribute Covid-19 vaccines.
Public health experts likened the situation to a race between vaccination and the virus’s new variants — and the winner will determine whether the United States is approaching a turning point in its battle against the coronavirus, now entering a second year.
“We’re definitely on a downward slope, but I’m worried that the new variants will throw us a curveball in late February or March,” said Caitlin
