How does the COVID-19 PCR test work?
From Genome.gov "PCR Fact Sheet": The Polymerase Chain Reaction test works by amplifying, or copying, DNA in order to test for it. It is also called "molecular photocopying". PCR can…
Sensitivity of COVID-19 tests is poor for days 0-7 of symptoms, and also for asymptomatic people
One study shows the rapid test is not very sensitive. The gold standard is a quantitative polymerase chain reaction (qPCR)-based system taking several hours to confirm positivity. For effective public…
COVID-19 tests are broken, all showed positive for a goat, fruit, and more
Tanzania has suspended the head of its national health laboratory in charge of testing for the coronavirus and ordered an investigation, a day after President John Magufuli questioned the tests'…