Yes remember 14 of 16 of the FDA panels were against the boosters. Two very senior level FDA people resigned over it. Biden is now planning to force it on kids and the FDA has not approved it. They are now an arm of Biden-Pfizer just like every other aspect of society. Vincent Racianello, very pro-vax, mainstream virologist, said there's no reason to take boosters. And sorry if I misremembered or read into this about JJ. Here's the Fauci quote and link: "There are different risks for adverse events, which are really very, very rare and very, very low, but in a certain situation, for example, if I were a woman, I would probably not have any problem at all with an mRNA because the rare, rare adverse event with mRNA vaccines is almost exclusively seen in young men. So you really have to balance what the risk benefit is. But I want to emphasize that the risk of adverse events is really very, very low." https://www.eatthis.com/news-moderna-jj-boosters-fauci/

Here is the stuff about JJ thrombosis, apparently not definitely coming from Fauci (was confusing), but "experts": "Experts say choosing an mRNA booster is a particularly good idea for women under age 50, who are at risk for a very rare but severe blood clotting disorder called “thrombosis with thrombocytopenia syndrome,” after receiving the J&J vaccine.

Young men might want to take the opposite route. Men ages 16 to 29 who receive either mRNA vaccine face an increased risk of a heart inflammation condition called myocarditis, as Fauci told ABC’s “This Week” on Sunday. Vaccine-induced cases of myocarditis tend to be mild and often resolve on their own — but if you’re concerned, you can avoid that risk. https://www.msn.com/en-us/health/medical/mix-and-match-covid-vaccine-boosters-are-here-how-to-choose-the-best-one-for-you/ar-AAPPXqV

Fauci's April advice about how to know if you're having a blood clot from JJ: https://www.eatthis.com/news-covid-vaccine-blood-clot-symptoms-fauci/

So now they want a second dose of JJ two months after the first, but take mRNA as a booster, it sounds like. Most people took J&J because it was one dose.