Final answer:
The four occurrences of events that provide the chain of infection are exposure, adhesion, invasion, and infection.
Step-by-step explanation:
The four occurrences of events that provide the chain of infection are:
- Exposure: This is when a person comes into contact with a potential pathogen. It could be through touching contaminated objects or being in close proximity to an infected person.
- Adhesion: In this stage, the pathogen attaches itself to a surface, such as the skin or mucous membranes, in order to establish colonization.
- Invasion: Once the pathogen has adhered to a surface, it enters the body and starts multiplying.
- Infection: This is when the pathogen causes damage to the host and produces noticeable signs and symptoms of disease.