WASHINGTON (AP) — As businesses reopened Friday in more of the U.S., an overwhelming majority of states still fall short of the COVID-19 testing levels that public health experts say are necessary to safely ease lockdowns and avoid another deadly wave of outbreaks, according to an Associated Press analysis.

Rapid, widespread testing is considered essential to tracking and containing the coronavirus. But 41 of the nation's 50 states fail to test widely enough to drive their infections below a key benchmark, according to an AP analysis of metrics developed by Harvard's Global Health Institute.

A...