Seven months since its first coronavirus case was reported, the world’s fourth most populous country is still largely flying blind.
Indonesia, an archipelago nation of 270 million people, has tested a smaller share of its population than every other major economy. It has conducted Covid-19 tests on eight out of every 1,000 people—fewer than less-developed Philippines, which has tested 34 people per 1,000, according to Our World in Data, a nonprofit research project based at the University of Oxford.
Mexico,…