Rate of re-positive RT-PCR test among patients recovered from COVID-19

Reverse transcription polymerase chain reaction (RT-PCR) test is the most important laboratory test we currently rely on for the diagnosis of Coronavirus disease 2019 (COVID-19).There is no effective treatment or vaccine for COVID-19 (1).One option proposed to save lives is to use convalescent plasma obtained from recovered patients (2).There are reports that recovered patients may carry the whole virus and/or viral ribonucleic acid (RNA) (RT-PCR-positive) for long periods (3,4).