There is already studies on that coming out of Wuhan and it's not looking good. Here are some highlights from my own research. Note that RT-PCR is what the CDC

There is already studies on that coming out of Wuhan and it's not looking good. Here are some highlights from my own research. Note that RT-PCR is what the CDC recommends and what most nations are using for testing COVID-19: > the total positive rate of RT-PCR for throat swab samples was reported to be about 30% to 60% at initial presentation [1] > In patients with negative RT-PCR results, 75% (308/413) had positive chest CT findings; of 308, 48% were considered as highly likely cases, with 33% as probable cases [2] > For patients with negative RT-PCR tests, more than 70% had typical CT manifestations. On the one hand, due to the overlap of CT imaging features between COVID-19 and other viral pneumonia, false-positive cases of COVID-19 can be identified on chest CT. Nevertheless, considering the rapidly spreading epidemic of COVID-19, the priority was to identify any suspicious CT case in order to isolate the patients and administer appropriate treatment [3] > Conclusions: In the close contacts of COVID-19 patients, nearly half or even more of the 'asymptomatic infected individuals' reported in the active nucleic acid test screening might be false positives [4] [1][2][3]: https://pubs.rsna.org/doi/full/10.1148/radiol.2020200642 https://pubs.rsna.org/doi/full/10.1148/radiol.2020200642 [4]: https://www.ncbi.nlm.nih.gov/pubmed/32133832 https://www.ncbi.nlm.nih.gov/pubmed/32133832