At present, there are no indications or statements that HIV infection generally increases the risk for a more severe course of COVID-19.
In Austria, too, almost all HIV-positive people have a stable immune system thanks to HIV therapy and thus do not automatically belong to the risk group mentioned above.
HIV-positive people with comorbidities (other pre-existing conditions) have an increased risk due to these (and regardless of HIV therapy) and should - like all HIV-negative people with pre-existing conditions - absolutely comply with all available protective measures!