I am looking for a book, possibly teen horror fiction that I read back between 1980-1983. The premise was a girl living with aunt/mom in a coastal town when a virus hits. She notices dead birds around the town and people start disappearing. The virus causes the infected to seek out the dark and they pass the virus by holding the person down and breathing into their mouth. Her family and friends become infected and she is left with a bunch of teen survivors who slowly get picked off. She ends up in an old house with a boy. I can’t remember the ending.