(Note: this is from a US perspective, so I'm leaving AZ, and other vaccines that don't have EUA here out of it.) Your questions would need to be answered by sc

(Note: this is from a US perspective, so I'm leaving AZ, and other vaccines that don't have EUA here out of it.) Your questions would need to be answered by scientific medical research... which hasn't been done. The "strong urge not to compare any of them" is good because there isn't a good basis for doing sound comparisons. Also, even if you somehow knew, for example, that Pfizer was X% more effective or X% safer for you than J&J, but J&J was available now while Pfizer would be available in 4 weeks, you would still need to add the risk of four additional weeks of unprotected exposure to the equation for Pfizer to understand the relative risks. Putting it together: (A) there isn't a sound way to compare the relative efficacy of J&J, Pfizer, and Moderna (especially on an individual basis) (B) waiting will increase your risk of serious problems from covid means "whichever one is available to you" is the right answer (not an "infantile" one -- careful there; you're throwing around a pejoritive, but I'm pretty sure you're the one who has a superficial grasp of the situation.) As more data is collected it may be possible to break things down, e.g., by age group or region (if a particular variant is dominant in a region a particular vaccine is especially effective against that variant), but we'll have to see.