A. It is the active immunity to diseases acquired via the administration of an antigen.
B. Often times, the administered antigen gives the patient a mild case of the disease.
C. Some vaccinations are composed of live suspensions of weak or attenuated cells or viruses.
D. Vaccinations stimulate the production of memory T-lymphocytes.
E. Vaccines can cause side effects in immunocompromised people and sometimes allergic reactions.
F. Vaccinations are usually given at specific ages and dates according to the schedule provided by the CDC.

Vaccinations have been proven to prevent and, in some cases, eradicate infectious diseases. Read the prompt to determine what statements correctly describe vaccinations. Choose all that apply.