Which of the Following Contributed to Several Measles Epidemics in the 1990s

question 23

Multiple Choice

Which of the following contributed to several measles epidemics in the 1990s?

• A)People had stopped getting immunizations for measles and other diseases.
• B)The measles vaccine was no longer effective against the agent because the virus had mutated.
• C)The measles vaccine did not provide lifetime immunity.
• D)Thousands of ineffective contaminated vaccine doses had unknowingly been injected.

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