'The chances of developing long COVID also seem to increase with each infection.'

'We clearly see people who say, ‘I had COVID three years ago, I did just fine. I had it a second time and was just fine,’ only to succumb to long COVID after a third infection.'

https://www.aamc.org/news/had-covid-recently-here-s-what-know-about-how-long-immunity-lasts-long-covid-and-more