Final answer:
Include vaccination as a secondary prevention strategy in emergency shelter protocols following a disaster.
Step-by-step explanation:
A secondary prevention strategy that the nurse should include in the protocols for emergency shelters following a disaster is vaccination.
Vaccination is a form of secondary prevention because it aims to prevent the spread of infectious diseases among the clients in the shelter.
By ensuring that clients are up-to-date with their vaccinations, the nurse can help reduce the risk of outbreaks and protect the health of the individuals in the shelter.