How Long Is Mild Covid Contagious 2024. People with moderate to severe illness or who are moderately to severely immunocompromised may remain contagious for 10 to 20 days or even longer. The guidelines offer a framework, but patients should take into account their circumstances, priorities and resources to assess risk.
At least four weeks after infection is the start of when long covid could first be identified. Learn about covid isolation guidelines and how long you should quarantine after a positive covid test.