Not medically necessary is a statement about cost vs utility. Many vaccines such as for rabies fall into that category for the general public. Rabies is one of

Not medically necessary is a statement about cost vs utility. Many vaccines such as for rabies fall into that category for the general public. Rabies is one of the deadliest diseases on the planet and the vaccine works just fine, but not enough people get infected each year to be worth it without some other risk factor.