HIV is transmitted by unprotected penetrative anal and or vaginal sex and sharing works. You never had a risk. PERIOD.
HIV is unable to reproduce outside its living host (unlike many bacteria or fungi, which may do so under suitable conditions), except under laboratory conditions; therefore, it does not spread or maintain infectiousness outside its host.
in the expert forum i was advised that its a low risk . please read again
You were never at risk like you were advised the the Expert Forum.