A nurse administers a pediatric dose of the COVID-19 vaccine to a girl at a L.A. Care Health Plan vaccination clinic at Los Angeles Mission College in the Sylmar neighborhood in Los Angeles. (ROBYN BECK/AFP VIA GETTY IMAGES/TNS)
By Tom Avril The Philadelphia Inquirer With so many people using athome COVID-19 tests, if they’re testing at all, experts acknowledged long ago that the…