If the rapist spits on them, maybe. If the person being raped bites them in self-defense, maybe. If the rapist is wounded and bleeds on them (and others!), mayb

If the rapist spits on them, maybe. If the person being raped bites them in self-defense, maybe. If the rapist is wounded and bleeds on them (and others!), maybe. The statistic you seek is "unsuccessful rape attempts that did not result in fluid transfer risk to the person being raped, bystanders, or emergency responders". If you are able to find it, feel free to link it here. I suspect you will find that no such data is collected. Fortunately, this is irrelevant. Given the severity of HIV, the full 18% figure can be safely taken at face value, for society-level disease prevention purposes. HIV is both expensive and deadly and vaccination is cheap.