The Last Invisible Man on Earth

Martin was a guy with nothing going for him. After his rich girlfriend breaks up with him, in despair and needing money, he decides to sign up for a military experiment to turn him invisible, and much to his surprise it works! Unfortunately the government wants to cover him up as a classified military secret but he has no desire to be a guinea pig, so he escapes from the military facility where he is imprisoned. Wondering what he is going to do he finds his situation changes when it seems that a virus is killing all of the men in the world except for him, possibly making him the last man on earth, and the same formula that has rendered him invisible might be the key to vaccinating all of the surviving men against human extinction, meaning that now the weight of the world and the survival of the human race may very well be dependent on him. But what's going to happen if his invisibility wears off, or for that matter what if it doesn't?