drron
Veteran Member
- Joined
- Jul 4, 2002
- Posts
- 35,800
It is possible that the disease is not covid as the symptoms can certainly be due to other diseases.How is it possible to test negative but still be diagnosed with Covid? Issue with the tests? Possibly long covid from a previous infection?
The false negative rate of PCR testing is low.Repeated testing should get the right answer.Here is a study from Canada showing that of a 100,000 tests 49 were initially negative when covid was suspected.46 were positive on the second test and 3 on the third test.None needed a 4th test.
False negative rate of COVID-19 PCR testing: a discordant testing analysis - Virology Journal
Background COVID-19 is diagnosed via detection of SARS-CoV-2 RNA using real time reverse-transcriptase polymerase chain reaction (rtRT-PCR). Performance of many SARS-CoV-2 rtRT-PCR assays is not entirely known due to the lack of a gold standard. We sought to evaluate the false negative rate...
virologyj.biomedcentral.com