For months, by Zoom calls and then by jet, Indonesian ministers and officials scoured the world for access to a vaccine for the coronavirus that Southeast Asia's biggest country is struggling to control. This month, their campaign paid off.

Three Chinese companies committed 250 million doses of vaccines to the archipelago of 270 million people. A letter of intent was signed with a U.K.-based company for another 100 million.

Absent from these pledges: the United States.