(5 points) Since all residents of the United States can get the Covid 19 vaccine at no cost, the

price for consumers is effectively zero. At a zero price there should be large shortage with high

demand and low supply. However, we know that there is no shortage and in fact there is a

surplus of vaccines. Why is supply of vaccines higher than a zero price would indicate, and why

is demand for vaccines lower than a zero price would indicate? Please give an explanation.