‘Immunity passports’ could be doomed by false-positive antibody tests (Washington Post)
Antibody testing has accelerated in the United States in recent weeks: In one prominent study, for example, involving some 3,000 New Yorkers, roughly 14 percent of state residents were found to have been exposed to the virus — and 1 in 5 in New York City. Some proponents of such tests believe they could pave…