Select the Statement That Correctly Completes the Following Sentence

Select the statement that correctly completes the following sentence. Toxoid-based vaccines work to protect us against microbial exotoxins that cause disease because _________________________________ (Select all that apply)

A) exotoxins can be rendered temporarily inactive with formalin.
B) changing the chemical structure of protein exotoxins to toxoids makes them safe for use as vaccines.
C) toxoids are immunogenic not pathogenic
D) individuals who receive a booster vaccination throughout their lifetimes can continue to have a high level of antibodies against the specific toxin.