In S3E09 of ST:TNG The Vengeance Factor, Riker is doing his thing and finds himself romantically involved with Yuta, who we later find out is from the supposedly extinct clan Trelesta. She is travelling with an Acamarian delegation as a servant to the Marouk, with the alternate agenda of killing the last of the Lornak clan which was responsible for the massacre of her clan.
Yuta had been genetically altered to not only live a very long life with very slow aging, but was also given a genetically engineered virus which, while completely harmless to others, was lethal to any who had the genetic makeup of the Lornak clan. The virus could be passed from Yuta to a Lornak by a mere touch, causing their death within seconds.
My question is, if Riker was romantically involved with Yuta, could he have become a carrier of the virus? While he himself would not have been harmed by the virus, could he have passed it along to any of the Lornak clan and caused a death inadvertently? Could anyone having come in contact with Yuta become a carrier?