Mild COVID-19 patients may lose brain tissue: study

Pre-print paper says scans show 'significant' loss of grey matter in smell and taste regions in those with mild symptoms

Even mild cases of COVID-19 may lead to loss of brain tissue, according to findings from a long-term study involving 782 volunteers.

As part of the ongoing UK Biobank study, more than 40,000 participants were scanned before the start of the COVID-19 pandemic, making it possible to invite back in 2021 hundreds of previously-imaged participants for a second imaging visit.

For a before-and-after comparison, researchers invited 394 COVID-19 survivors to come back for follow-up scans as well as 388 healthy