Based on previous recommendations of the California Department of Public Health on how to keep the workplace safe:
Employees should stay home or go home when they are sick with influenza symptoms. Staff with symptoms of influenza (fever and cough, sore throat, or runny nose) should stay home until they are fever-free for 24 hours without using fever-reducing medications. Employees should not come back to work with a fever.
Review your leave policies. Work with your personnel office if you have questions.
If you have increasing absenteeism due to employees home sick with influenza symptoms, protect remaining employees against the spread of influenza by limiting meetings and conferences. Instead of face-to-face meetings and conferences, consider using email, telework, web- and teleconferences.
Maintain a supply of face tissues and access to hand washing facilities or hand hygiene products (alcohol-based hand sanitizer), and make these available throughout the workplace.
Place disinfectant wipes in commonly used places. Encourage employees to disinfect commonly touched hard surfaces in the workplace, such as work stations, counter tops, and door knobs.
Post signs informing people to "cover their cough" and wash their hands in facility locations such as entrances, visitation rooms, notice boards, conference rooms, break rooms, and restrooms, where feasible and appropriate. You can get examples of these posters in English and other languages from the CDPH website.