Subunit Vaccines Are Generally Considered Safer Than Attenuated Vaccines Because

Subunit vaccines are generally considered safer than attenuated vaccines because _____.

A) subunit vaccines do not require booster shots.
B) attenuated vaccines may cause disease in some individuals.
C) attenuated vaccines only elicit a humoral immune response.
D) attenuated vaccines elicit a weak immune response.
E) subunit vaccines elicit both a humoral and cell-mediated immune response.