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PPD
A. purify protein derivative
B. purified protein derivative
C. purify protein derivation
D. purified protein derivation
AIDS
A. acquired immune deficiency symptom
B. acquired immuno deficiency syndrome
C. acquired immuno deficiency symptom
D. acquired immune deficiency syndrome
HIV
A. human immunodeficiency virus
B. human immunodeficient virus
C. human immunodetection virus
D. human immunodepletion virus
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