Thank you for your inquiry. From what we gather from the question, you were asking about the risk of transmission of HIV from laying naked on a towel. From the information given, this scenario is determined to be No Risk (transmission of HIV is not possible in the given scenario).
The scenario mentioned above does not meet the three components of the transmission equation. In order for HIV to be transmitted, fluids (such as blood, semen or vaginal fluids) must have direct access to your bloodstream through activities such as sharing needles, or unprotected sex. The CDC has shown that HIV does not survive for long outside the body and when exposed to oxygen it quickly undergoes a reduction in concentration (1). HIV also cannot replicate outside of the human host (2). Therefore, any fluids that theoretically may have been present on the towel would have been exposed to oxygen, rendering the virus inactive.
Recommendation: No need for HIV test with the scenario provided, refer to a healthcare professional for other health related questions.
AIDS Vancouver Helpline/Online, Rashell
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1.) Survival of HIV in the Environment.
2.) HIV Transmission Basics.