100% of the people exposed to dihydrogen monoxide die. Does that make it bad? Can you prove that it killed anyone or were they killed by car crash, heart attack, or any other source?

Same for the vaccine. Yeah a few people may have died after getting it but did it DIRECTLY contribute to their death or was there some other cause for the death? And by that same token, how many people have been vaccinated that did not die or have any side effects other than a sore arm.