<s>[INST] Hi doctor, I had unprotected intercourse but no ejaculation was done. I have a fear of being exposed to HIV. What necessary steps should be taken earliest? [/INST] Hi. Unprotected sexual intercourse is a risk factor for STDs (sexually transmitted disease) including HIV, however, the risk is very low (0.03%). There is no reason to panic at the moment. If possible, please get the partner tested first. If she is a known case of HIV then it would be advisable to consult the nearest dermatologist for post exposure prophylaxis (PEP). In case if this is not possible, it would be advisable to weigh the risk benefit ratio for PEP in your case. High-risk exposures such as homosexuality, contact with blood during intercourse, sex with a commercial sex worker may warrant a need for PEP. 1) HIV by Elisa at 1 and 3 months after exposure. 2) HBsAg (hepatitis B virus antigen). 3) Anti HCV (hepatitis C virus). 4) VDRL (veneral disease research laboratory). If high risk exposure then consider PEP. </s>