U.S. health officials are considering different ways of preparing for a future worldwide epidemic of human influenza that could be derived from a form of the disease that infects birds (avian flu). Which actions would be useful in preventing a future influenza epidemic?
A) Inject helper T cells into healthy people to boost immune systems. B) Inoculate infected people with a vaccine against the pathogen. C) Give antibiotics to people with mild symptoms. D) Ask people with flu symptoms to stay at home.