Workers transfer COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

Workers load COVID-19 vaccines from China onto a truck at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

A worker transfers COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

Workers unload COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

Djiboutian Health Minister Mohamed Warsama Dirieh (L, Front) and Chinese Ambassador to Djibouti Zhuo Ruisheng (R, Front) attend a handover ceremony of COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

A worker transfers COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

Workers transfer COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)

A worker prepares to transfer COVID-19 vaccines from China at Djibouti-Ambouli International Airport in Ambouli town, Djibouti, on March 18, 2021. The first batch of COVID-19 vaccines from China arrived in Djibouti on Thursday. The vaccines, made by Chinese pharmaceutical firm Sinovac, will help the African country's immunization campaign against the pandemic. (Chinese Embassy in Djibouti/Handout via Xinhua)