U.S. looking to loan AstraZeneca COVID-19 vaccine doses to Canada and Mexico

White House press secretary Jen Psaki confirmed Thursday the U.S. is looking to "loan" a total of 4 million doses of the AstraZeneca vaccine to Canada and Mexico — 2.5 million to Mexico and 1.5 to Canada. 

Psaki said the U.S. has 7 million "releasable" doses of the vaccine, which has yet to be approved by the U.S. Food and Drug Administration but has been approved by other countries. In the past, Psaki has responded to questions about why the U.S. is holding onto the AstraZeneca vaccine doses by saying the Biden administration is prioritizing vaccinating Americans.  The pandemic, Psaki said, "knows no borders." Canada and Mexico are not the only countries that have requested the United States' AstraZeneca doses. Europe has as well.