The length to which people with no morals will go to convince themselves they are good never ceases to amaze me.
If the 30 year old is employed in a position with many unavoidable close contacts, the expected number of lives, life-years, or QALYs saved by vaccinating them can be much higher than the 70 year old, if the latter has few unavoidable close contacts.
But the risk of dying is around 50x higher[1] for a 70yo compared to a 30y, which means you have to vaccinate ~15x as many 30yos as 70yos to save the same amount of life-years.
So vaccinating the elderly first both saves lives and more life-years.
[1] https://www.cdc.gov/coronavirus/2019-ncov/covid-data/investi...
This makes the fallacious assumption that if life expectance at age X is n years, life expectancy at age X+k is n-k years.
This is very much not true. See, e.g., https://www.ssa.gov/oact/STATS/table4c6.html
Using actual life expectancy by age makes the number of life years saved at age 70 much closer to that at age 30.
...which is still a factor of ~3x, which means my napkin math wasn't too shabby, which means this tangent was completely irrelevant, because my main point is unchanged.
If a 70+ that otherwise would not have died from COVID gets vaccinated but on account of not getting vaccinated the OC dies from COVID, is that moral?
Utilitarian maximalism (via statistical predictions) is an approach to morality, not the approach.