Has anyone had ringworm reinfect the same cat?

We have a kitten that ended up having ringworm so it's like here we go again.  Thankfully, she's been quarantined from the beginning and we went to a vet clinic that has a black light.  She's not been exposed at all to the other cats.  I've been hoping that there is a built up resistance to ringworm once an animal has had it.  I've heard some sites mention it but then I've heard other sites talk about how cleanup has to be careful or it can come back.  Since I haven't heard anything with certainty I was wondering if anyone here has had the same cat get reinfected with ringworm again?  Also, what about people?  Has anyone here had it and then get it again in a separate incident?

More accurately it is a fungus.

The kitten that we have with it was found very malnourished so I'm hoping that since Gizmo has already gone through ringworm and is much healthier that he won't get it again.  We never figured out with certainty if Tux got it or not.  But he's well fed and healthy for his age.  Us humans definitely had it.  We also had the flu though before we got it.

I'm of course going to keep the kitten quarantined from the others and from us.  I'm not one to take chances.  But I've heard mixed stories on immunity to it once one's had it.  It's something I've been curious about looking more into with different sources saying different things.

We have a member who works at a shelter in NYC and has mentioned getting ringworm on separate occasions, so it's highly doubtful that a resistance can be built up. One's immune system plays a very large role, which is why children and the elderly are susceptible to it. Our shelter periodically gets cats and kittens rescued from a kill shelter in Romania, and virtually all of them have been infected. Hygiene has to have top priority. We put them in quarantine, treat with Itraconazole and dips/ointments and do an incredible amount of scrubbing and disinfecting. One FIV+ senior needed months to get over his. He had 3 negative cultures, but still ended up with more lesions after a few weeks. He'd been moved to a different room in another part of the shelter, so we figure he must have had some surviving spores in his coat (very long hair) or in some open wounds he had.