Read on Twitter
1/
FDA to lawmakers: your negative Covid test doesn't rule out an infection. Diagnostic tests have a high false negativity rate because they can't detect low levels of the virus during early stages of an infection. They're designed to confirm an infection, not to rule it out
https://twitter.com/ShahramSN/status/1348128520325660674
FDA to lawmakers: your negative Covid test doesn't rule out an infection. Diagnostic tests have a high false negativity rate because they can't detect low levels of the virus during early stages of an infection. They're designed to confirm an infection, not to rule it out https://twitter.com/ShahramSN/status/1348128520325660674
2/This review, for instance, shows that on the day of the infection, PCR tests missed 100% of the cases. Each day after that the detection rate improves, but even by Day 5, when viral load is presumably high, tests missed over a third of infections.
https://www.acpjournals.org/doi/10.7326/M20-1495
https://www.acpjournals.org/doi/10.7326/M20-1495
3/Over reliance on testing can get people in trouble. Like the White House super spreading event where people were presumably tested and so they dropped their guard. Even with a negative test, we have to be vigilant with masks, distancing, and ventilating indoors spaces.
