People wearing protective masks wait to get inoculated with the Sinovac COVID-19 vaccines in Manila, the Philippines on May 1, 2021.Photo:Xinhua

A man gets inoculated with a dose of the Sinovac COVID-19 vaccine in Manila, the Philippines on May 1, 2021.Photo:Xinhua

People wearing protective masks are screened before getting inoculated with the Sinovac COVID-19 vaccines in Manila, the Philippines on May 1, 2021.Photo:Xinhua

A health worker prepares a dose of the Sinovac COVID-19 vaccine in Manila, the Philippines on May 1, 2021.Photo:Xinhua

A vial of the Sinovac COVID-19 vaccine is seen at a vaccination site in Manila, the Philippines on May 1, 2021.Photo:Xinhua

A health worker shows a vaccination card before giving a dose of the Sinovac COVID-19 vaccine to resident in Manila, the Philippines on May 1, 2021.Photo:Xinhua