You should carefully review the CDC Interim Guidance for Businesses and Employers. This guidance includes recommendations to prevent and slow the spread of COVID-19, including routine cleaning, social distancing guidelines for employees, and the latest advisories on employee travel.
If you are an essential retail business continuing to operate, you should follow social distancing guidelines for retail businesses provided by the New Jersey Department of Health (NJDOH).
The Occupational Safety and Health Administration (OSHA) also had Guidance on Preparing Workplaces for COVID-19 [pdf], including recommended restrictions on non-essential employee travel.
Separate sick employees immediately and send them home, encouraging them to follow CDC-recommended steps for What To Do if You Are Sick. If an employee is confirmed to have COVID-19 infection, inform fellow employees of their possible exposure but maintain confidentiality as required by the Americans with Disabilities Act (ADA). For further guidance about steps to take immediately after an employee becomes tests positive for COVID-19, follow the guidance of your Local Health Department, which you can identify with the Find Your Local Health Department tool.
Any person or group planning domestic or international travel should consult the CDC's COVID-19 Travel website and advisories. As a general matter, all non-essential travel is discouraged. Travelers returning from countries known to be affected should immediately follow recommendations provided by the CDC for Travelers Returning from High Risk Countries.
The U.S. Department of Labor has guidance on the Fair Labor Standards Act pertaining to your obligations to employees regarding telework and other situations that arise from the outbreak. It covers employee work hours, payment, and telework guidelines.
Updated: March 29, 2020
Source: CDC Interim Guidance for Businesses and Employers, U.S. DOL: COVID-19 and the Fair Labor Standards Act Questions and Answers