People do some stupid shit for ratings. Trust me. But everyone has KA, we're all infected, it's an airborne virus with a droplet based transmission vector so it nailed all of us up the ass, dry. Our individual viral loads stay dormant until something happens to activate it.
But when it activates we transfer it by blood and mucus. Since we're all infected, I don't think anyone's done any research on if the dormant virus transfers through sex.