Pop-up COVID-19 testing sites offering quick results seem to be popping up everywhere. But are they reliable? In New York City, Inside Edition found pop-up sites operating out of rental vans. One advertised “express results in 8 to 24 hours.” Our producer got swabbed, but 24 hours passed, and there were still no results. Three days passed and we never got any results, so we went to try and get some answers.