Oh dear, that sounds positively terrifying. Poor him and poor you
Truth be told, there isn't much you can do at this point other than wait for him to stop being sick before disinfecting again. Don't feel too badly about not being there-hes a grown man. I would also venture a guess that most adults wouldn't want someone next to them when it's coming out of both ends!
Hang in there, practice good hygiene and disinfect the HELL out of both the bed and bathrooms. Keep us updated on how he's doing.
Sending you positive thoughts!