Police officers wait to receive the COVID-19 vaccination at a police hospital in Colombo, Sri Lanka, Jan. 31, 2021. A vaccination program is underway in six major hospitals in Sri Lanka where 250,000 frontline workers will be vaccinated in the coming days. (Photo by Ajith Perera/Xinhua)

Medical workers prepare for the COVID-19 vaccination at a police hospital in Colombo, Sri Lanka, Jan. 31, 2021. A vaccination program is underway in six major hospitals in Sri Lanka where 250,000 frontline workers will be vaccinated in the coming days. (Photo by Ajith Perera/Xinhua)

A police officer receives the COVID-19 vaccination at a police hospital in Colombo, Sri Lanka, Jan. 31, 2021. A vaccination program is underway in six major hospitals in Sri Lanka where 250,000 frontline workers will be vaccinated in the coming days. (Photo by Ajith Perera/Xinhua)