Indeed, Mexico generally moved at a glacial pace in processing death statistics. It was hardly alone. “Mortality data is kind of a big black hole worldwide,” said Andrew Noymer, an epidemiologist [and associate professor] at the University of California, Irvine who specializes in death rates from pandemics. Even the U.S. Centers for Disease Control and Prevention typically took months to compile death statistics. As coronavirus cases soared, the CDC shrank that to a week.