Why Has Finding an Effective AIDS Vaccine Been So Difficult

question 30

Multiple Choice

Why has finding an effective AIDS vaccine been so difficult?

• A)Because it is caused by a virus.
• B)Because they have not yet isolated the virus that causes AIDS.
• C)Because the virus constantly mutates and so vaccines need to be made for all types.
• D)The body does not make antibodies against the virus.
• E)It is a sexually transmitted virus.

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