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Viral
Factors
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-HIV-1 strains
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-Viremia
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Local
Genital Factors
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-Presence of STDs
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-Male circumcision
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-Use of vaginal products
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Sexual
Behavior
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-Rate of partner exchange
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-Sexual mixing patterns
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-Type of intercourse
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-Size of and rate of contact with
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core
groups
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-Level of condom use
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