What is the single effective most effective way to prevent infections? What are two additional ways to control the spread of germs that are spread through the air, such as colds? (Site 1)

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.