A resident receives a shot of the AstraZeneca COVID-19 vaccine at Kenyatta National Hospital in Nairobi, Kenya, March 5, 2021. Kenya's health ministry on Friday kicked off COVID-19 vaccination campaign with frontline health workers as the first to receive the vaccine. (Photos by Joy Nabukewa/Xinhua)

A nurse prepares to administer a shot of AstraZeneca COVID-19 vaccine at Kenyatta National Hospital in Nairobi, Kenya, March 5, 2021. Kenya's health ministry on Friday kicked off COVID-19 vaccination campaign with frontline health workers as the first to receive the vaccine.

A nurse administers a shot of the AstraZeneca COVID-19 vaccine to Patrick Amoth, acting director general of health and the first one to receive the jab in the country, at Kenyatta National Hospital in Nairobi, Kenya, March 5, 2021. Kenya's health ministry on Friday kicked off COVID-19 vaccination campaign with frontline health workers as the first to receive the vaccine.

A nurse shows a dose of the AstraZeneca COVID-19 vaccine at Kenyatta National Hospital in Nairobi, Kenya, March 5, 2021. Kenya's health ministry on Friday kicked off COVID-19 vaccination campaign with frontline health workers as the first to receive the vaccine.

A resident prepares to receive a shot of the AstraZeneca COVID-19 vaccine at Kenyatta National Hospital in Nairobi, Kenya, March 5, 2021. Kenya's health ministry on Friday kicked off COVID-19 vaccination campaign with frontline health workers as the first to receive the vaccine.