WASHINGTON — President Joe Biden came up well short on his goal of delivering 80 million doses of coronavirus vaccine to the rest of the world by the end of June as a host of logistical and regulatory hurdles slowed the pace.

Although the Biden administration has announced that about 50 countries and entities will receive a share of the excess COVID-19 vaccine doses, the U.S. has shipped fewer than 24 million doses to 10 recipient countries, according to an Associated Press tally.

All the American shots are ready to ship, the White House said. Rather, it's taking more time than anticipated to sort through a complex web of legal requirements, health codes, customs clearances, cold-storage chains, language barriers and delivery programs. One country requires an act of its Cabinet to approve the vaccine donation; others require inspectors to conduct their own safety checks on the U.S. doses. Still others have yet to develop critical aspects of their vaccine distribution plans.

The U.S. recipients to date are Colombia (2.5 million Johnson & Johnson doses), Bangladesh (2.5 million Moderna), Peru (2 million Pfizer), Pakistan (2.5 million Moderna), Honduras (1.5 million Moderna), Brazil (3 million J&J), South Korea (1 million J&J), Taiwan (2.5 million Moderna), Canada (1 million Moderna, 1.5 million AstraZeneca) and Mexico (1.35 million J&J, 2.5 million AstraZeneca).