Author: THE NEW YORK TIMES

New York City will reopen its middle schools this month. The United States mulls requiring domestic air travelers to show a negative virus test.

AstraZeneca’s vaccine has been shown to protect against the virus variant first detected in the U.K. In the U.S., “vaccine hunters” are crossing state lines in search of doses.

More than 27 million Americans have received a first shot, and more than six million are fully inoculated. But as wealthy nations accelerate campaigns, there is concern that poorer countries are being left behind.

New York City has the tools to test for variants, but screens only 1 percent of new cases. A team of experts from the W.H.O. investigating the origins of the pandemic visited a research center in Wuhan, China.

A study found that the AstraZeneca vaccine cuts transmission of the virus by two thirds, underscoring the importance of mass vaccination as a path out of the pandemic.

A study suggests one vaccine dose might be enough for some coronavirus survivors. The C.D.C. says it’s scaling up the search for variants. South Africa receives its first batch of vaccine doses.

The E.U. moved to limit AstraZeneca from sending doses outside the bloc, amid a dispute with the company over delivery delays. Johnson & Johnson said that its one-dose vaccine was effective, but less so in South Africa, where a new variant is circulating.

Fauci urges a speedy return to school. Pregnant women are getting conflicting advice about vaccines. And New York seriously undercounted virus deaths in nursing homes, investigators say.

Spain became the first country to partly suspend immunizations for lack of doses. New York may reopen indoor dining. Catch up on pandemic news.