The common cold is considered a viral, bacterial or fungal infection.

The common cold is regarded a viral.
Viruses: are the source of well-known diseases (colds, conjunctivitis, nasopharyngitis, bronchitis acute, flu, gastroenteritis, measles, mumps, chickenpox, herpes)

The question may be incomplete (there are not the possible answers), but according to the scenario, kaley and her coworkers could be in a humanitarian organization like red cross (in the us or in other countries). it's an organization which organizes health and safety services, disaster services, and blood donations.