For vaccines, we shouldn’t even be dispensing them at cost. Vaccinations are the second most cost effective public health intervention ever, beaten only by clean drinking water.
In purely financial terms, the cost of vaccinations are lower than the average cost to the US tax payer of someone getting sick. The public service of people not getting sick is a nice bonus. As is reducing the chances of this becoming another Covid style economic catastrophe (plus, again, the public service of protecting your citizens)