Answer: Assuming you don't want to make everyone quarantine or argue with employees about their Thanksgiving dinner plans, I’d follow the guidelines used for exposed healthcare workers. Everyone in the workplace should:
In addition, the company should check employees’ temperatures and ask about symptoms when they arrive for work each day.
These are good practices regardless of whether any employees will be attending large indoor gatherings, but they are that much more important when employees are engaging in high risk activities. If you’re not already requiring most or all of these things, I would encourage you to start now and continue throughout the duration of the pandemic.