But the kid, and how exactly does that happen? Not counting all the work I need to do around the place and all the work I am dedicated to doing for my job how does it happen that the adults get sick and the kiddo doesn't?
Well, it could be that the adults have more stuff to do than a little kid, and that can debilitate their defenses. Not eating well, stress, work, etc....
Because you endure more stress which weakens your immune system and also frequent exposure to the outside environment makes you more prone to acquiring viruses and bacteria that people carry around.