"Healthy boys may be more likely to be admitted to hospital with a rare side-effect of the Pfizer/BioNTech Covid vaccine that causes inflammation of the heart than with Covid itself, US researchers claim."
Well if you have two groups, 100% of whom got the vaccine, versus 0.25% or whatever who got Covid, then sure that's not unlikely. But in a few years, 100% of those who don't get the vaccine will get covid. So this isn't exactly a rational basis for making decisions.