Workers unload a batch of the Sinovac CoronaVac vaccine that the Philippines has purchased from China at Manila Ninoy Aquino International Airport in Manila, capital of the Philippines, yesterday. China has sustained the COVID-19 vaccine supply to the Philippines since the first delivery Feb. 28. The Southeast Asian country kicked off its vaccination drive March 1. With the arrival of the latest batch of the Sinovac vaccine, the Philippines is closer to achieving population protection by year end. China has so far delivered more than 1.7 billion doses of finished and bulk vaccines to the world.Xinhua