Dr. Igor Koralnik, left, examines a patient. (Credit: Northwestern Medicine)

A new Northwestern Medicine study of 52 long haulers, who were not hospitalized and only experienced mild symptoms like cough and sore throat, found that most continued to experience neurologic symptoms, fatigue and compromised quality of life up to 18 months after initial infection. 

Dr. Igor Koralnik, left, examines a patient. (Credit: Northwestern Medicine)

A Northwestern Medicine study of 100 COVID-19 long haulers found that 85% experienced four or more neurologic symptoms, including “brain fog,” that impacted their quality of life and, in some patients, their cognitive abilities.