India, Feb. 3 -- Patients with long COVID in the United States report significantly higher rates of brain fog, depression and other cognitive symptoms compared with patients in countries such as India and Nigeria, according to a large international study led by Northwestern Medicine. The findings were published in Frontiers in Human Neuroscience.

Researchers cautioned that the higher symptom burden reported in the U.S. may reflect lower stigma and greater access to neurological and mental healthcare services, rather than more severe disease.

The study - the first cross-continental comparison of neurological manifestations of long COVID - tracked more than 3,100 adults evaluated at academic medical centers in Chicago (U.S.); Medellin (Co...