evidence: If you, or people around you, have Risk Factors for Severe Illness from Respiratory Viruses (CDC), taking extra precautions, including additional strategies (masks, distancing, and tests), can help to prevent illness. [...] - Guidance from the CDC for health care workers: Interim Guidance for Managing Healthcare Personnel with SARS-CoV-2 Infection or Exposure to SARS-CoV-2. [...] - Businesses, facilities, or other private settings are encouraged to follow MDH and CDC guidance, at a minimum. They may also choose to require longer stay-at-home periods or longer mask-wearing periods after exposure to someone who has COVID-19.