The other difference that the dazzler was happy to ignore is that some viruses, like measles, mumps, polio, whooping cough, tetanus are not mutating and you can get pretty much a lifetime immunity for many of them with a one time vax. Equating a rapidly mutating virus like the flu or covid with polio is comparing apples to dog sh*t. Also, comparing a dead or deactivated virus vaccine like the mumps with a mRNA vax is like equating a 9mm handgun with a claymore mine which tears apart everything in front of it.