People line up to receive a Pfizer COVID-19 vaccine dose during a mass vaccination campaign in Abidjan, Ivory Coast, in August 2021. Issouf Sanogo/Getty Images hide caption
COVAX
COVID-19 vaccines from COVAX, the international vaccine-sharing program, arrive in Khartoum, Sudan, on Aug. 5. In a letter to President Biden, health experts are asking him to take action to manufacture and distribute vaccines to the entire world. Ebrahim Hamid/AFP via Getty Images hide caption
Containers of Moderna vaccines donated by the U.S. arrive last week in Bogotá, Colombia. Leonardo Munoz/AFP via Getty Images hide caption
Biden Says U.S. Leads The World In Vaccine Donations — And Promises More
Health workers arrive in a tuk-tuk to administer doses of the Pfizer COVID-19 vaccine to elderly citizens in their homes in Lima, Peru, in April. Ernesto Benavides/AFP via Getty Images hide caption
Vaccine doses are in short supply in African countries — and even when they arrive, there may not be a way to get them into people's arms in a timely fashion. Above: People wait to get vaccinated at a hospital in Thika, Kenya, in March. Patrick Meinhardt/Bloomberg via Getty Images hide caption
A man takes a selfie while getting the COVID-19 vaccine during a vaccination day in Mexico City. Hector Vivas/Getty Images hide caption
People wait their turn to receive the COVID-19 vaccine at a hospital in Chennai, India, in April. India is among the nations that will receive surplus U.S. vaccine through the international distribution system COVAX, the White House announced. Arun Sankar/AFP via Getty Images hide caption
The White House Says It Has Started Shipping Surplus COVID-19 Vaccines Abroad
From left: A New Delhi woman waits in an observation room after getting the Covishield vaccine (the name used for the AstraZeneca vaccine in India) on May 26. U.K. Prime Minister Boris Johnson leaves a vaccination center after his first AstraZeneca dose on March 19. On March 9, Nairobi, Kenya, began vaccinating groups, including health care workers and older people, with the AstraZeneca vaccine. From left: Prakash Singh, Aaron Chown, Robert Bonet/Getty Images hide caption
It's The Vaccine That's Lost A Lot Of Trust. But AstraZeneca Still Has Its Fans
An older person receives their first dose of the AstraZeneca vaccine in Thika, Kenya. The vaccine's manufacturer, Serum Institute of India, announced this week that it will freeze all exports of the vaccine through the end of this year — leaving 20 million people in Africa without a source for their second dose. Patrick Meinhardt/Bloomberg via Getty Images hide caption
20 Million Africans Are Due For Their 2nd COVID Shot. But There's No Supply In Sight
A patient rests at the COVID ward of the regional hospital in Leova, Moldova, on March 23. Moldova remains one of the poorest countries in Europe and has relied on vaccine donations from Romania and COVAX, a program that aims to distribute the world's vaccines more equitably. Daniel Mihailescu/AFP via Getty Images hide caption
The Kindred Spirits sculpture in Midleton, County Cork, Ireland, pays tribute to a gift from the Choctaw nation to help during the 19th century potato famine. Ireland paid it back with donations to the Navajo and Hopi nations to help them during the pandemic. Gavin Sheridan hide caption
A bishop receives a vaccine for COVID-19 at Juba Teaching Hospital on April 7 in Juba, South Sudan. South Sudan received 132,000 doses of the Oxford-AstraZeneca vaccine on March 25 through the World Health Organization's COVAX program to ensure all countries have equal access to vaccines. Andreea Campeanu/Getty Images hide caption
They Desperately Need COVID Vaccines. So Why Are Some Countries Throwing Out Doses?
A woman lines up to receive the AstraZeneca vaccine in Mexico City on Feb. 17. Alfredo Estrella/AFP via Getty Images hide caption
Ghana is the first country to receive a shipment of COVID-19 vaccines from the global COVAX program. Above: The vaccines are unloaded at the Kotoka International Airport in Accra on February 24. Nipah Dennis/AFP via Getty Images hide caption
Edna Halup, a staff member at a private nursing home, receives a Pfizer COVID-19 vaccine, in Ganei Tikva, Israel, on Dec. 22. Ariel Schalit/AP hide caption
UNICEF said Monday it plans to stockpile 520 million syringes in its warehouses in preparation for an eventual COVID-19 vaccine. This warehouse in Copenhagen, Denmark, is part of the agency's infrastructure to deliver medical supplies around the world. AP hide caption
A worker feeds vials for production of a vaccine for COVID-19 at the SinoVac vaccine factory in Beijing. China said on Friday that it is joining the COVID-19 vaccine alliance known as COVAX. Ng Han Guan/AP hide caption