Jaysus. RT-PCR swab tests have a 30% false negative rate!
A positive result on the swab tests is usually reliable. “If you get a positive test result, looking for the RNA of the virus with the current methods that we have, it’s very likely to be a true positive,” said Jana Broadhurst, an infectious disease doctor and director of the Nebraska Biocontainment Unit Clinical Laboratory at the University of Nebraska Medical Center. But “if you get a negative test result, [the chance that it’s wrong is] about 30%.” Of every 100 symptomatic people who test negative for Covid-19, 30 are actually infected. The test missed them.
‘Informing management of lockdowns and a phased return to normality: a Solution Scan of non-pharmaceutical options to reduce SARS-CoV-2 transmission’. This is a pretty exhaustive list of possible approaches to lower the R0.