I have a friend with one gene Factor V Leiden. He had a miserable reaction to his first Moderna vaccine. He had a much worse reaction to his second Moderna vax. This was in early 2021 when my small city was having hearings on Covid and municipally supplied vaccines. I submitted testimony to the fact that Factor V and also Sickle Cell Trait and Disease (which affects Africn-Americans) were two blood conditions which might bear special attention. I suggested that at vaccine clinics, people with those conditions should be made aware of potential reactions and also be encouraged to stay more than 15 minutes to see if a bad reaction occurred after the shot. I also submitted an estimate as to how many thousands of the city residents might have those conditions. In addition I suggested that since around 2.5 times more Blacks were dying of Covid that it would be a good idea to encourage people to improve their immunity with Vitamin D3 capsules. I never saw any sign these advices were acted on by my local government.
Recently I saw titles of 2 articles on Factor V and the Covid issue, but unfortunately my computer jumped to another tab before I could copy the URLs for these articles. Perhaps someone else saw them and could send me the URLs.
You should be able to look at your browser history and see those previously viewed pages. Also, you could search again using the term “Factor V Leiden COVID.”