Yes there is: Brain imaging before and after COVID-19 in UK Biobank https://www.medrxiv.org/content/10.1101/2021.06.11.21258690v1 https://www.medrxiv.org/conte

Yes there is: Brain imaging before and after COVID-19 in UK Biobank https://www.medrxiv.org/content/10.1101/2021.06.11.21258690v1 https://www.medrxiv.org/content/10.1101/2021.06.11.21258690v... Cognitive deficits in people who have recovered from COVID-19 https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(21)00324-2/fulltext https://www.thelancet.com/journals/eclinm/article/PIIS2589-5... Long term loss of smell and taste is not a known symptom of stress, anxiety, or depression either as far as I am aware.