<s>[INST] What is the risk of transmitting HIV through body piercing or tattooing? [/INST]  A risk of HIV transmission does exist if contaminated instruments are either not sterilized or are shared with others. Instruments that are intended to penetrate the skin should be used once, then disposed of or thoroughly cleaned and sterilized. Source: UNAIDS. Link: https://www.unaids.org/en/frequently-asked-questions-about-hiv-and-aids. Field: Infectious Disease. Disease: HIV </s>