Most likely, dementia does not increase risk for COVID-19, the respiratory illness caused by the new coronavirus, just like dementia does not increase risk for flu. However, dementia-related behaviors, increased age and common health conditions that often accompany dementia may increase risk.
Coronavirus (COVID-19): Tips for Dementia Caregivers https://www.alz.org/help-support/caregiving/coronavirus-(covid-19)-tips-for-dementia-care