A medical worker shows a box of China's Sinovac COVID-19 vaccines in Montevideo, Uruguay, March 1, 2021. Uruguay's government on Monday began its immunization campaign against COVID-19 with vaccines developed by Chinese pharmaceutical firm Sinovac, prioritizing teachers, the military and the police.

A medical worker prepares to administer China's Sinovac COVID-19 vaccine in Montevideo, Uruguay, March 1, 2021. Uruguay's government on Monday began its immunization campaign against COVID-19 with vaccines developed by Chinese pharmaceutical firm Sinovac, prioritizing teachers, the military and the police.

A woman receives a jab of China's Sinovac COVID-19 vaccine in Montevideo, Uruguay, March 1, 2021. Uruguay's government on Monday began its immunization campaign against COVID-19 with vaccines developed by Chinese pharmaceutical firm Sinovac, prioritizing teachers, the military and the police.

A woman receives a jab of China's Sinovac COVID-19 vaccine in Montevideo, Uruguay, March 1, 2021. Uruguay's government on Monday began its immunization campaign against COVID-19 with vaccines developed by Chinese pharmaceutical firm Sinovac, prioritizing teachers, the military and the police.

A man receives a jab of China's Sinovac COVID-19 vaccine in Montevideo, Uruguay, March 1, 2021. Uruguay's government on Monday began its immunization campaign against COVID-19 with vaccines developed by Chinese pharmaceutical firm Sinovac, prioritizing teachers, the military and the police.