Seventy (million), 75 million doses typically have been enough vaccine in years past.
We do not expect any shortages. As far as we know, there is equitable distribution across the country. We have not heard reports of anyone not having vaccine at all.
We don't know how many of the 86 million have been sold. We know that vaccine is available. Chiron said they had 1.3 million available to be sold.
The high end, if that (97-million) is reached, it will be the largest amount of flu vaccine ever made.