There have been very few, and I'd say there are very few in the world. That's because, to go back to what Alex said, this notion of a person living with HIV intentionally trying to infect other people is actually something of an urban myth. There may be the occasional isolated case where such a thing happens, but it is not by any means the predominant set of circumstances captured by the broad scope of the criminal law as it currently stands.
On April 9th, 2019. See this statement in context.