Sometimes, lying awake at night, I imagine what my mutant T cells are up to. In real life, normal ones are spherical and are generally depicted looking like meat balls or balls of wool, with a halo of fine filaments. It is not clear if they can move around the body of their own accord, but I imagine them as rampaging gangs, like the droogs in the film A Clockwork Orange, moving through my blood vessels looking for mischief…