It is extremely harsh, although one has to balance the effect that transmission has had on the victim.
I think it's a backward step in the sense that I feel it will make people less not more likely to own up to any sexually transmitted infection they might have.
I know someone whose new partner is HIV positive ( he told her before they began their relationship) but he really needn't have and some people's reactions to the idea are very very negative, so I can understand people's reticence in saying to soemone they've just met ' I have herpes/ HIV' etc.
There needs to be less stigma not more regarding such things.