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
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
A phlebotomist draws blood at a free COVID-19 antibody testing event on Feb.17 in Pico Rivera, Calif. Frederic J. Brown=/AFP via Getty Images hide caption
A light micrograph of a mature sporangium of a mucor fungus. India is seeing a rise in cases of mucormycosis, a rare but dangerous fungal infection. Smith Collection/Gado/Getty Images hide caption
Amit Sonawane, 35, an engineer at a district health office, gets his first vaccine dose in Palghar, India. Viraj Nayar for NPR hide caption
Maji Hailemariam Debena in Addis Ababa, Ethiopia. Maji Hailemariam Debena hide caption
Aziz Abdul Alim, a 103-year-old man from a remote valley in Upper Chitral of northern Pakistan, is both a COVID survivor and a proud supporter of the COVID vaccine. Sohail Ahmad hide caption
Nardo Samson posing with granddaughter Kiara Bautista, May 2017. Jan Daniel Belmonte 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
Polio vaccinator Zeenat Parveen, holding the clipboard, and a volunteer go door-to-door to reach children in Rawalpindi, a city near the Pakistani capital of Islamabad. Diaa Hadid/NPR hide caption
A portrait of the late Dr. Li Wenliang at his hospital in Wuhan, China. Li was a whistleblower in the early days of the country's coronavirus pandemic and died of COVID-19 on Feb. 7, 2020. Stringer/Getty Images hide caption
The Khaliq Dina Hall and Library building in Karachi, Pakistan, has been converted into a COVID-19 vaccination center. Akhtar Soomro/Reuters hide caption
Chinese travelers at a railway station in Beijing, China, wear face masks to protect themselves from the new coronavirus on Jan. 21, 2020. The virus was first identified in Wuhan, China, in Dec. 2019, and since then has quickly spread worldwide. Kevin Frayer/Getty Images hide caption