Interim Guidance for Implementing Safety Practices for Critical Infrastructure Workers Who May Have Had Exposure to a Person with Suspected or Confirmed COVID-19 [open pdf - 343KB]
From the Document: "To ensure continuity of operations of essential functions, CDC [Centers for Disease Control and Prevention] advises that critical infrastructure workers may be permitted to continue work following potential exposure to COVID-19 [coronavirus disease 2019], provided they remain asymptomatic and additional precautions are implemented to protect them and the community. A potential exposure means being a household contact or having close contact within 6 feet of an individual with confirmed or suspected COVID-19. The timeframe for having contact with an individual includes the period of time of 48 hours before the individual became symptomatic."
Centers for Disease Control and Prevention: https://www.cdc.gov/