Does anyone know the name of this Movie?. Basic plot is a virus kills nearly everyone but some survivors are in Antarctica I think. There is an earthquake predicted in USA which will trigger nuclear weapons automatically being fired everywhere including where these survivors are. The movie starts I think with a man walking back alone returning to the survivors after having disarmed the nukes. The movie is about him recalling these events. I seem to think the movie is 1970's.
I believe the film you are thinking of is Virus, also known as Day of Reckoning from 1980.
From the IMDb synopsis: