Sask. 100% COVID-19 Infected by May 20,2020

[Jay-mo]

That does not appear to be the case. There are supposedly a few instances in China, but if I remember right, it is 0.15% of infected. The suspicion is that they were either never fully recovered to start with, or there were false positives.
Even if 0.15% do get reinfected, that insignificantly small number would still allow society to get back to normal, since 99.85% of those infected would now be immune.

Subject to change if newer evidence paints a different story.

Manitoba quietly admitted today that 1 of the 20 positives here, was a false positive.