> 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