Researchers Tie Severe Immunosuppression to Chronic COVID-19 and Virus Variants; An Inside Look at a Post–COVID-19 Clinic; COVID-19 and the “Lost Year” for Smokers Trying to Quit Related Content: Researchers Tie Severe Immunosuppression to Chronic COVID-19 and Virus Variants An Inside Look at a Post–COVID-19 Clinic COVID-19 and the “Lost Year” for Smokers Trying to Quit