[burger]

I believe that most doctors/epidemiologists who've looked at this don't think reinfection is happening.  The immune system makes antibodies to the virus, and most infections resolve that way.  Once that happens, you can't get reinfected to the point of being sick again for some time.  That time is unknown but should be months at least, if not years.  I don't believe that there are any confirmed cases of someone having symptoms, recovering, and then getting symptoms again.  The PCR test for the virus is very sensitive, and if there is still virus RNA around, the test may pick it up.

[burger]

I believe that most doctors/epidemiologists who've looked at this don't think reinfection is happening.  The immune system makes antibodies to the virus, and most infections resolve that way.  Once that happens, you can't get reinfected to the point of being sick again for some time.  That time is unknown but should be months at least, if not years.  I don't believe that there are any confirmed cases of someone having symptoms, recovering, and then getting symptoms again.  The PCR test for the virus is very sensitive, and if there is still virus RNA around, the test may pick it up.