David Cronenberg's 1977 sci-fi/horror film stars Marilyn Chambers, Frank Moore and Joe Silver. This begins with woman, Rose (Chambers) riding a motorcycle with her boyfriend, Hart (Moore). They get into an accident and Rose goes into a coma, but needs immediate surgery. A month later, she awakens with a lethal appendage craving blood. When she starts feeding on strangers, an infectious, epidemic spreads. The late, Silver plays Hart's friend, Murray. This isn't bad, the late, Chambers was good in this and there's gruesome make-up effects. I'd give this a try.