It is possible for a neocoronavirus to return positive after conversion.
Some patients do get positive results again after being infected with the new coronavirus. This may be due to the fact that the new coronavirus is a coronavirus and the viral genome may undergo mutation. Although the infected person may acquire a certain degree of immunity, the mutated virus may undergo changes in its biological characteristics, which may lead to recurrence of re-infection when the human body is exposed to it again.
In addition, the results of nucleic acid testing may be biased, with false negative or false positive results, for example, the presence of interfering substances such as rheumatoid factor in the body, or specimens contaminated by bacteria, or substandard specimen collection, leading to abnormal test results, which would determine a patient who still has the new coronavirus as negative.