inclusion criteria: * exposure to covid-19 in the last 60 days with no symptoms, with a covid negative test close contact: within 6 feet of a covid-19 positive person for more than a few minutes without wearing ppe, or having direct contact with infectious secretions without ppe * positive covid-19 test with or without symptoms

inclusion criteria: * exposure to covid-19 in the last 60 days with no symptoms, with a covid negative test close contact: within 6 feet of a covid-19 positive person for more than a few minutes without wearing ppe, or having direct contact with infectious secretions without ppe * positive covid-19 test with or without symptoms

inclusion criteria: - exposure to covid-19 in the last 60 days with no symptoms, with a covid negative test close contact: within 6 feet of a covid-19 positive person for more than a few minutes without wearing ppe, or having direct contact with infectious secretions without ppe - positive covid-19 test with or without symptoms

inclusion criteria: - exposure to covid-19 in the last 60 days with no symptoms, with a covid negative test close contact: within 6 feet of a covid-19 positive person for more than a few minutes without wearing ppe, or having direct contact with infectious secretions without ppe - positive covid-19 test with or without symptoms