Kelley Mack, an actress known for her roles in "The Walking Dead" and "Chicago Med," has died at the age of 33. Mack passed away on August 2nd, with her mother and aunt by her side. The cause of death has been attributed to a glioma, a type of tumor affecting the central nervous system. This follows Mack's public disclosure in January of her diagnosis with diffuse midline … [Read more...] about ‘The Walking Dead’ Actress Kelley Mack Dies at 33, Fans Mourn Sudden Loss