I’m not an expert and I’ll be avoiding any jab as long as possible, but if I had to commit to a position, I’d say the J&J jab is safer, but only because it’s a one-and-done jab. My understanding from the statistics I’ve seen and videos I’ve watched is that the bulk of the casualties and maimings happen after the second jab. If you only need one, you should in theory be in the same adverse reaction category as those who had only their first shot of the other brands.
J&J had some significant bad press early on and the shots were banned for 10 days, but it was never clear to me whether this was government and big pharma trying to kill off the competition, or whether there really was something more dangerous about J&J’s jab.
Other thing I don’t know is do all 3 modify mrna? My friend thinks J&J doesn’t alter genes in any way.