Body Fluids: Spread by direct contact with body fluids such as blood, urine, saliva, semen, or vomit. Examples include Hepatitis B, HIV, and Pinkeye.
Airborne: Spread by droplets from the nose, throat, and mouth. Examples include cold, chicken pox, influenza, measles and pertussis (whooping cough).
Fecal-oral: Spread by contact with human stool. Characterized by upset stomach, diarrhea, nausea, and vomiting. Examples include giardia, rotavirus, hepatitis A, salmonella, norovirus, and campylobacter.
Person to person contact/contact with contaminated items: Spread by contact with infected skin or with objects such as toys, clothing, and bedding. Examples include ringworm, scabies, and lice.