I hope that person pulls through JGF

.
There's no science behind this, but my
personal opinion, based upon what I've read in the news, heard from people like yourself with your story above and seen on TV, is that the re-infection rate is like that akin to measles or chicken-pox.
I was at Dundry Primary School when chicken-pox did the rounds. Out of a school of 120-150 pupils there were 3 people who got it twice. Lets say 1 in 100 people get it twice, so aren't immune from having caught it before and recovered. That statistic is still BETTER than the vaccine, which boasts a 95% immunity.
If my opinion, plus my maths is correct, then:
If you catch the virus and recover, then you have about a 1 in 100 chance of catching it again
If you have NOT had the virus and take the vaccine, then you have a 1 in 20 chance of catching it.
So, I'm still safer having had the virus than if I hadn't and took the vaccine. Of course, we are a country of 70m people, so if you multiply the stats up to scale then that means 700,000 could
potentially get it more than once - but that is the absolute worst case scenario where the entire population of this country get it - which won't happen.
Those people that you mention above are all nurses, so presumably they are exposed to the virus in larger quantities than the average person. Without in any way dismissing their suffering I would suggest that the conditions that they work in put them at greater risk than the rest of us due to the exposure, but they could still be that 1 in 100 people. Out of 100 nurses (or other healthcare workers), I would guess that perhaps 1 would get it twice - which would support my theory. Do you know 100 healthcare people who have actually HAD Covid JGF?