A resident shows a box of CoronaVac COVID-19 vaccine, made by Sinovac Biotech, after being inoculated at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

Residents wait to be inoculated with CoronaVac COVID-19 vaccines, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

Residents wait to be inoculated with CoronaVac COVID-19 vaccines, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

Residents wait to be inoculated with CoronaVac COVID-19 vaccines, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

A resident is inoculated with a dose of CoronaVac COVID-19 vaccine, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

Residents wait to be inoculated with CoronaVac COVID-19 vaccines, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

A resident is inoculated with a dose of CoronaVac COVID-19 vaccine, made by Sinovac Biotech, at a vaccination site in Manila, the Philippines on April 4, 2021. The Philippines' Department of Health (DOH) reported 11,028 new COVID-19 infections on Sunday, bringing the total number of confirmed cases in the Southeast Asian country to 795,051. The death toll climbed to 13,425 after two more patients died from the viral disease, the DOH said. (Photo: Xinhua)

Manila City Mayor Francisco Domagoso shows a dose of Sinovac COVID-19 vaccine in Manila, the Philippines, April 4, 2021. Domagoso got his Sinovac jab on Sunday after the government allowed the vaccination of mayors and governors in Metro Manila and areas with high infection rates. (Photo: Xinhua)

Manila City Mayor Francisco Domagoso receives a dose of Sinovac COVID-19 vaccine in Manila, the Philippines, April 4, 2021. Domagoso got his Sinovac jab on Sunday after the government allowed the vaccination of mayors and governors in Metro Manila and areas with high infection rates. (Photo: Xinhua)