The Centers for Disease Control and Prevention (CDC) Wants at Least

Multiple Choice

The Centers for Disease Control and Prevention (CDC) wants at least 90% of the population vaccinated against preventable diseases, since the chance of a disease outbreak decreases as vaccine coverage increases. We can conclude that:

A) the external benefits of vaccination likely decrease as more and more people are vaccinated.
B) the private benefits of vaccination increase with vaccine coverage.
C) vaccines create a negative externality once the vaccine covers 90% of the population.
D) vaccines create a positive externality once the vaccine covers 90% of the population.