: After sexual transmission of HIV, a person can be infected yet seronegative for _____ months. Question 2: Once they have penetrated the first line of defense, which microorganisms do neutrophils actively attack, engulf, and destroy by phagocytosis? Question 3: Which statement about vaccines is true?

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Question 1: After sexual transmission of HIV, a person can be infected yet seronegative for _____ months.