The United States is donating 750,000 vaccines to Taiwan as part of Washington's plan to share shots globally.
The donation is a major boost for the island which is struggling with a spike in domestic cases.
The announcement was made by U.S. Senator Tammy Duckworth,
who along with two other Senators arrived in Taiwan from South Korea on Sunday.
President, Tsai Ing-Wen said the vaccines would be a great help in their fight against the virus.
"We are very grateful to the Biden administration for extending their hands and adding Taiwan to the first batch of vaccines being shared abroad. We also thank the three senators, who are present here, for their great efforts in helping to organise this. The vaccines are timely for Taiwan, and your assistance will be etched on our hearts."
Taiwan reported more than 340 new coronavirus cases on Sunday.
Only around 3% of its 23.5 million people have been vaccinated, with most getting only the first shot of two needed.
Taiwan has complained about China trying to block the island from accessing vaccines internationally.
Beijing, which claims the democratically-ruled island as its own, denies this.
China has offered Taiwan Chinese-made vaccines, but the government in Taipei has repeatedly expressed concern about their safety.
On Friday, Japan delivered to Taiwan 1.24 million donated doses of AstraZeneca's coronavirus vaccine.