Recurrences of COVID-19 are rare, so scientists cannot yet say for sure
At the same time, scientists observed a case of repeatedinfection in a patient with coronavirus four months later. They concluded that there were two separate episodes of infection in this case. The reason may be either re-infection due to weak immunity, or reactivation of the remains of the coronavirus in the patient's body.
The researchers believe that since it has been a long time since the initial infection, their patient had two separate episodes of infection.
As the COVID-19 pandemic evolves,reports showing re-infection with SARS-CoV-2 is possible, so a positive SARS-CoV-2 RNA test does not necessarily indicate persistent shedding of the virus over an extended period of time.
However, the US Centers for Control andDisease Prevention Control (CDC) believe that a positive coronavirus test within 90 days of initial infection is more likely to indicate sustained shedding of the virus, rather than reinfection.
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