Health and Human Services Secretary Alex Azar arrived in Taiwan on Sunday in the highest-level visit by an American Cabinet official since the break in formal diplomatic relations between Washington and Taipei in 1979.

Azar is due to meet with the island’s independence-leaning President Tsai Ing-wen along with health officials during a three-day visit aimed at highlighting cooperation in the fight against the coronavirus.

Azar is the first health secretary to visit Taiwan and the first Cabinet member to visit in six years.

Azar’s visit was facilitated by the 2018 passage of the Taiwan Travel Act, which encouraged Washington to send higher-level officials to Taiwan after decades during which such contacts were rare and freighted with safeguards to avoid roiling ties with Beijing.