US to share tens of millions of AstraZeneca vaccine doses

The United States will share up to 60 million doses of the AstraZeneca vaccine against the coronavirus with other countries, the White House announced on Monday. It is not known to which countries the vaccine would be offered. The US Food and Drug Administration has not yet authorized the AstraZeneca vaccine for use. Most of those doses are still being produced, however, and will not be available until May or June.