Genetically engineered vaccines are considered safer than older vaccines because they
- A. contain live pathogens
- B. are never tested before use
- C. contain only specific proteins of the pathogen, not the whole organism
- D. provide immunity without any immune response
Explanation
Recombinant vaccines such as hepatitis B present one safe protein to the immune system, removing any risk of the disease itself. An immune response is still required; that is how the memory is made.
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