Missed by a letter: HIV doesn't cause ulcerative lesions. And it is HARD to transmit with protected sex. BUT herpes simplex can be transmitted by contact but without fluid transfer. Also it causes ulcerative lesions. HSV but not HIV can be transmitted by oral sex. Ulcers make transmission of HIV more likely due to the break in skin BUT not relevant to earlier exposure.
Answered 10/9/2015
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