The virus that causes mono (Epstein-Barr virus) isn't spread as easily as most people think. If you follow these tips, you can reduce the chance of spreading or catching mono.
Don't kiss or share dishes or eating utensils with someone who has mono. (A brief kiss on the lips is not likely to spread Epstein-Barr virus. It is spread when saliva from an infected person gets into another person's mouth.)
Don't donate blood if you have mono. Although it is unusual for the Epstein-Barr virus to be spread through blood, it is possible.