Dr. Elizabeth Allemann discusses how the virus can linger in airspace as an aerosol or droplets and answers listener questions: If you’ve been exposed to and contracted the virus, how long will it take for symptoms to appear (if at all), and at what point does one become contagious? Can you continue to test positive for COVID-19 after recovering from the virus? Now that we have been asked to shelter in our homes, is it safe to take a walk down the street, or do we have to keep entirely inside?