Two new meta-analyses detail neurologic and psychiatric conditions in COVID-19 patients, one suggesting that symptoms such as fatigue and depression are common even in people with mild illness, and the other showing central and peripheral nervous system involvement in up to 36% of cases that increased the risk of hospitalization.Brain involvement the norm, rather than exceptionIn the first study, published yesterday in the Journal of Neurology, Neurosurgery & Psychiatry, a team led by University College London researchers conducted a systematic review and meta-analysis of 215 COVID-19 studies from 30 countries involving 105,638 symptomatic COVID-19 patients from January to July 2020.The most common symptoms were loss of smell (43%),