In my family, all the COVID deniers have caught COVID, maybe taking Paxlovid. Those of us in this household got our flu, shingles, pneumonia, COVID and other shots as recommended or needed over the last 20 years. While two of the family here died of their old age conditions between 2022 and 2023, nobody ever contracted flu, common cold, COVID, pneumonia or any such infections over those twenty years.
I updated my flu and COVID shots three weeks ago.