It is more complicated than that, information has been slowly coming out and the captain followed the chain of command, but the letter was leaked. There is more going on here. Also when illness goes through a carrier it gets bad fast and they have had serious problems even with flu bugs. They are in extremely tight quarters, I have heard many stories. If they are sick enough that they can't do their jobs it is serious. That said it now looks like he sent the letter and action was taken after which it was leaked. I want to know who the leaker is