Northwestern Medicine Study Gives Clues About How Long COVID-19 Symptoms Can Linger Posted on January 23, 2022 by Chicago 1 Chicago Chicago News & Search 1 News - 1 eMovies - 1 eMusic - 1 eBooks - 1 Search Search for: A new study from Northwestern Medicine gives more clues about just how long COVID-19 symptoms can linger. 1 Chicago Chicago News & Search 1 News - 1 eMovies - 1 eMusic - 1 eBooks - 1 Search Search for: