One key planning factor for pandemic influenzas will be:

A. Managing public expectations about which agencies can do what and in what timeframe

B. Protecting public health employees as they work on a vaccine

C. Developing strategies for keeping sick employees on the job

D. Identifying additional mutual aid partners

Option B is correct one.

Explanation:

One key planning factor for pandemic influenzas will be Protecting public health employees is important.

This is due to the fact that the public health workers are the front-line soldiers in a pandemic situation so they must be protected in order to eradicate the pandemic from the society.