Read on Twitter
RE-INFECTION TRACKER—now 11: There has now been 11 documented cases of #SARSCoV2 infection. @BNONews has been tracking such clinical reinfections of #COVID19. By BNO unofficial tabulation, there are now 11, 4 of which suffered more severe 2nd infection. 
https://bnonews.com/index.php/2020/08/covid-19-reinfection-tracker/
https://bnonews.com/index.php/2020/08/covid-19-reinfection-tracker/
2) The most recent reinfection was reported yesterday in a 42 year old military healthcare worker in a Virginia military hospital. 2nd infection was worse than the first, 51 days after initial. But recovered. https://twitter.com/drericding/status/1308724605234880514
3) The first ever officially documented reinfection case was from Hong Kong on August 24th. In that case, the patient had a milder 2nd #COVID19 illness. They always verify reinfection with a second genome 
sequence and compare with the first infection gene sequence. https://twitter.com/drericding/status/1297854438221197313
sequence and compare with the first infection gene sequence. https://twitter.com/drericding/status/1297854438221197313
4) The second major documented reinfection was from Reno Nevada on August 28th. But this time, the second infection was more severe requiring hospitalization. https://twitter.com/drericding/status/1299362114373648385
5) as pointed out before, reinfections are rare (we think), but clearly do happen— out of millions of cases, you’re bound to find some. But @VincentRK says it should be rare enough that immunocompromised people should be okay.
6) that said ”In order to provide herd immunity, a potent vaccine is needed to induce immunity that prevents both reinfection & disease” according to experts. This has implications also for herd immunity too. https://twitter.com/drericding/status/1297987970453184512
7) That said, expert admit it is hard to “confirm” a reinfection per se. Because it requires having full virus samples from both infections to run full genome sequences on both. That’s harder to come by, more expensive to run, and more rare since it’s usually needs researchers
sequences on both. That’s harder to come by, more expensive to run, and more rare since it’s usually needs researchers
