J&J, one and done. In any future scenario where the vaccinated have privilege over the non-vaccinated(as has been proposed with vaccine passports), then J&J is the better choice. 1.5 months to freedom vs 15 days. People can say out loud otherwise because it's not the right thing to say, but deep down J&J offers the best incentive for a non-vulnerable risk-group member.
"Whichever one is available to you" is a platitude that assumes all our motivations for getting it are the same. You're doing it out of concern for X, I'm doing it because chances are I'll have to, etc.
Data from the study released this week (of frontline healthcare workers vaccinated in December) showed that the mRNA shots had a high efficacy just two weeks after the first dose, likely higher than the efficacy of the J&J shot.
Just a single data point from one study, but I raise it only to point out that it may in fact not be the case that the J&J shot provides better immunity vs two weeks after the first mRNA dose.
If your goal is just to get a vaccine passport then J&J will still be the better option until regulators acknowledge that one shot of mRNA is about as good
That assumes that, at this point in time, having a "vaccine passport" confers some concrete benefit. It's also more like 2 weeks vs. 5 weeks. The other factor is if you end up getting a vaccine somewhere 2 hours away or something like that. Which is a reasonable consideration but fairly minor in the scheme of things.
