I don't know, wish I did, so I could treat it.
Either grabbed something at WDW, buffet utensils, etc... I don't want to blame the cruise ship, but it just seems to me that my Mom, son and myself got it, along with others I know who were onboard.
Yes, it could be low immune, on the go all day, sun, I don't know, I do know that I got it 1 1/2 days after leaving the ship.
It has turned into a dry dry cough, up all night with it, low grade fever, stuffed nose now, headache, body aches.