Biden Sending U.S.-Authorized Covid Vaccines Overseas for First Time

The US plans to share 80 million vaccine doses globally by the end of June, including 20 million from Pfizer, Moderna, and Johnson & Johnson, marking the first time doses authorized for US use will be shared. Jeff Zients is appointed to oversee the global distribution effort, working with the NSC and other agencies. The US aims to increase its vaccine arsenal and address global demand, with future plans to expand distribution.

Who has been appointed to oversee the global vaccine distribution effort?

What is the significance of the 80 million doses mentioned in the text?