That is not true. All the articles I read said the re-infection idea is just a rumor. Any appearance of that was simply caused by faulty testing or releasing a patient before they were fully cured. This is a virus so your body will have immunity if you survive and clear the infection.
It is definitely true that like a lot of illnesses, symptoms may fade away and come back stronger later. But this is not a re-infection.
So, then if patients are released too early and are still infectious, we don’t know all the parameters. How long must individuals be quarantined after their symptoms are gone to prevent this? Two weeks post-recovery? That means we should be arguing for a national 6-week quarantine for everyone.