Any disease that can be transferred to another person, be it through touch, air travel, or blood, is considered communicable.

One of the most common communicable diseases that people are familiar with is the cold, which can be transferred between people quite easily.

Rabies is a communicable disease that is most commonly transferred when an animal carrying it bites another animal or human being.

A disease that cannot be given to you by another person, such as diabetes or heart disease, is not a communicable illness.

Cancer is not a communicable disease, and someone who had it cannot pass it on to another person.