Which of the Following Statements Are True of Vaccines (Select

Multiple Choice

Which of the following statements are true of vaccines (Select all that apply) ?

A) Vaccines contain antigens to stimulate antibody production.
B) A vaccine antigen may be a pathogen that has been killed or attenuated.
C) A vaccine antigen may be part of a pathogen or a toxoid.
D) The purpose of a vaccine is to take the place of a first exposure to a pathogen.
E) A vaccine stimulates the creation of memory cells (T or B or both) to a specific antigen.
F) On a second exposure to a pathogen,antibody production has a lag period,then IgG production follows IgA production.