Hi there. In 2021 I took both Pfizer vaccines. I did my annual health exam in February 2021 my platelet counts were normal around 325 and healthy as a bull. Routine 2022 physical My platelets went to 520. In 2023 physical exam My platelets went to 791. Prompted my physician to have me see a specialist. So I did all the tests necessary and my CAL Exon9 mutated, causing my platelets to go high. Looking at the timeline I am certain that is after I took the vaccine. I am a health 51 year old in 2021. I eat properly and work-out over two hours a day. No past health issues or hereditary. Both parents are alive in the 80s with no major issues. Something got triggered in my body and the timeline is exactly what other people are experiencing.