Can you put some numbers on the risks?

Information about the index partner (the person the patient had sex with)

Exposure

Risk if the index HIV status not known

Estimated risk of HIV transmission per exposure from a HIV-positive individual not on suppressive ART

A man who has sex with men living in England Receptive anal sex (index penis into patient anus) 1 in 4,000 1 in 90
A man who has sex with men living in England Insertive anal sex (patient’s penis into index anus) 1 in 28,000 1 in 666
A man who has sex with men living in England Receptive vaginal sex (index penis into patient’s vagina) 1 in 43,000 1 in 1000
A man who injects drugs Receptive vaginal sex (index penis into patient’s vagina) 1 in 180,000 1 in 1,000
A heterosexual man living in England Receptive vaginal sex (index penis into patient’s vagina) 1 in 170,000 to 1 in 5 million 1 in 1,000
A women living in England Insertive vaginal sex (patient’s penis into index vagina) 1 in 140,000 to 1 in 12 million 1 in 1,219