Experts at the University College London (UCL) were the latest to describe that Covid-19 could cause neurological complications including stroke, nerve damage, and potentially fatal brain inflammation -- even if the patients didn't show severe respiratory symptoms associated with the disease.

"We should be vigilant and look out for these complications in people who have had Covid-19," said joint senior author Dr.

They varied in age from 16 to 85, and showed a range of mild to severe symptoms.

Among these patients, researchers found 10 cases of "temporary brain dysfunction" and delirium; 12 cases of brain inflammation; eight cases of strokes; and eight cases of nerve damage.

Most of the patients who showed brain inflammation were diagnosed with a specific, rare and sometimes deadly condition known as Acute disseminated encephalomyelitis (ADEM).

Researchers are still trying to figure out why exactly Covid-19 patients are developing these brain complications.