The United States says it will share its entire supply of the AstraZeneca COVID-19 vaccine with other nations. A White House statement said up to 60 million doses of the vaccine are expected to be available for export in the coming months. The AstraZeneca vaccine is widely used around the world. But it has not received emergency approval from the U.S. Food and Drug Administration (FDA). U.S. officials say they are reviewing the safety of the AstraZeneca supply before shipping doses out in the next several weeks. About 10 million AstraZeneca doses have been produced in the U.S. About 50 million more are still in the production process and could be available to ship in coming months. The doses will be donated by the U.S. government, which has contracted with the company for a total of 300 million doses. Jeff Zients leads COVID-19 efforts for President Joe Biden. He said the U.S. feels assured that its supply of FDA-approved vaccines -- from Pfizer, Moderna and Johnson & Johnson will be enough to meet U.S. needs in coming months. Last week, the U.S. restarted use of Johnson and Johnson shots after a brief break while health officials investigated possible safety risks.