CDC Flip-Flops on Coronavirus Testing Guidelines

New CDC guidelines for asymptomatic coronavirus testing caused an
uproar this week. The advice was that people who’ve been exposed to
the coronavirus but don’t have symptoms shouldn’t get tested. But
then, in an unusual clarification, the CDC walked that back.
Meanwhile, the FDA gave “emergency use authorization” to a rapid
antigen test that costs only $5. Also this week, Governor Gavin
Newsom signed a deal with a diagnostics lab to more than double
test processing capacity in California. We’ll explain what these
developments mean and which could help open schools and bring our
economy back to life.