Jason's Virus

After a tornado, Jason is trapped with his son for two years in the cellar of their new home. Once rescued they discover that a horrible virus has decimated the planet leaving in it's wake only children and women. Every grown man at or beyond puberty died within weeks of the outbreak.
Jason, who previously worked at the Center for Disease Control makes it his mission to find the cure knowing that both he and his son lacked the immunity the young boys acquired during the outbreak.