Of course they exist. They are as real as Djokovic's three slam titles in 2023. The question is, what to do about them?
So - update - my daughter, despite multiple exposures because everyone on campus has Covid, she has been traveling, and her quadruple vaxxed roommate directly exposed her before she was sick enough to leave campus, has not even a sniffle. Yes, she ramped vitamin C,D and took Xlear, it all helps, a lot. But, she's unvaccinated. So, remind me again why she would get the 5th injection? Oh, that's right, to prevent Crohn's. Because it certainly ain't preventing Covid after the vaccine efficacy wears off after several months, if at all. She's just one data point, an outlier no doubt, let's discard it.
The real question is, when she goes to play tennis, should she wear a N95, or is just a cloth mask ok on the court?