What are ways to spread infectious disease from person to person?
Contact transmission - Direct contact with an infected person, such as touching. Needle stick, STDs, contaminated blood transfusion. Indirect contact as well - touching a bloody stretcher railing, shaking hands with a father who has just wiped infected child's nose. Those object that harbor infection are fomites.
Droplet transmission - Inhalation of infected droplets. TB. 3-6ft rule.
Airborne transmission - pathogens transmitted by airborne particles. Can become aerosoloized when a person coughs.
Vector - organism that harbors pathogens that are harmless to the organism. Mosquito with west nile.