Why Will the Zostavax Vaccine Be Phased Out Over Time

Multiple Choice

Why will the Zostavax vaccine be phased out over time?

A) Because the virus can mutate and the vaccine will no longer be effective
B) Because with prolonged use of the vaccine, patients will no longer mount a proper immune response to the virus
C) Because older patients are less likely to be able to afford the vaccine, so it is more cost effective to vaccinate children
D) Because all children will have been vaccinated against Varicella zoster so they will not get shingles when they are older