In this photo released by the Taiwan Centers for Disease Control, Taiwan's Health Minister Chen Shih-chung, third from left, and Brent Christensen, the top U.S. official in Taiwan, fourth from left, hold up thank you cards as they welcome a China Airlines cargo plane carrying COVID-19 vaccines from Memphis. Taiwan Centers for Disease Control via AP The US on Sunday sent Taiwan 2.5 million COVID-19 vaccine doses, the AP reported. Previously, the US said it would send 750,000 vaccine doses to the island. Taiwan has been dealing with an outbreak of COVID-19 since May. See more stories on Insider's business page. The US sent 2.5 million COVID-19 vaccine doses to Taiwan this weekend, more than triple the country promised to deliver earlier this month as it deals with an ongoing COVID-19 outbreak.As the Associated Press reported Sunday, Taiwan had been relatively successful in staving off COVID-19 until May.