Voted for Other.

While you are ill you need to have high doses of vitamin C, drink like a litre of orange juice each day you are sick. The rest of the time drink only water at least a litre each day.

Chicken soup is also a good thing to have and sleep.

Another really good thing to prevent getting sick in the first place is to thoroughly brush your tongue twice a day, use mouth wash as well. Have fruit each day as well. And while I love meat, I limit it to once a week nowadays. I never get ill anymore.