The process by which an infectious agent moves from one host, source, or environment to another.
Transmission describes how an infectious agent spreads. Depending on the infection, transmission may occur through direct contact, respiratory particles, contaminated food or water, blood, sexual contact, contaminated objects, animals, or vectors such as mosquitoes.
Transmission does not necessarily result in infection every time. Whether infection occurs depends on factors such as the infectious agent, dose or exposure, route of entry, and susceptibility of the exposed person.
COMMONLY CONFUSED WITH
- Infection: establishment of an infectious agent in a host.
- Contagious: describes an infection or disease that can be transmitted between hosts.
- Exposure: contact with an infectious agent or other hazard; exposure does not necessarily lead to infection.
SEE ALSO
