Retrieved from: Occupational Safety & Health Administration

During an influenza pandemic, transmission of the pandemic virus can be anticipated in the workplace, not only from patients to workers in healthcare settings, but also from customers and coworkers in general work settings. Employers can use a set of occupational safety and health controls referred to as the “hierarchy of controls” to reduce exposures to pandemic influenza in their workplaces.

https://www.osha.gov/Publications/employers-protect-workers-flu-factsheet.pdf