~60 million are <12 years of age, which means that they aren't eligible for the vaccine at this time, and I've seen reports that it is unlikely we'll have vaccines for the youngest among us. So 82% of the population is the absolute most we can vaccinate.

With the demographic numbers and the (admittedly terrible proxy of) allergy numbers, 86 million people wouldn't be vaccinated (~25%). With a 0.2% percent fatality rate, we are talking about 170,000 deaths if all of them get infected.