[Avodah] Vaccinations - Rav Asher Weiss

[Alexander Seinfeld]

Zev Sero wrote:


>As you point out parapets have two modes of failure: defective
>construction, and people climbing over them; however uncommon these are,
>that's a non-zero failure rate; not the 2% of the MMR vaccine, but let's
>suppose 0.02%. (Against that, consider that the risk to the person whom
>the remedy fails is much higher for the parapet than the vaccine; the 2%
>whom the vaccine fails to protect will, *if exposed*, catch one or more
>of the three diseases, with a >99% chance that they will survive with no
>lasting injury, whereas the 0.02% -- or whatever the true number is --
>whom the parapet fails stand a >99% chance of injury or death.)
>
>Parapets also carry a minuscule risk, e.g. from people striking their
>heads against them, which is almost certainly significantly *higher*
>than the corresponding 1/1M risk from the MMR vaccine.

They are not comparable. By the parapet, no one is at risk from the
parapet itself.