There are plenty of un vaccinated people getting reinfected why would you ask when you will say that the figures are wrong and its part of the conspiracy,immunity wanes and new variants infect people.
We have all move don since the 1950 and so has medical research then we only had to have 1 polio shot now you need 4.
https://www.webmd.com/vaccines/covid-19-vaccine/news/20211024/unvaccinated-people-likely-to-catch-covid-repeatedly
https://www.webmd.com/lung/can-you-get-covid-twice#1
https://www.science.org/content/article/more-people-are-getting-covid-19-twice-suggesting-immunity-wanes-quickly-some
