"Doctors and carers should watch out for any changes in mental state in elderly people, such as confusion or strange behaviour, and be alert to the fact that this could be an early sign of coronavirus infection.”
www.kcl.ac.uk/news/delirium-a-key-sign-of-covid-19-in-frail-older-people?fbclid=IwAR0N-pOIeoSgTftIupbafuuiRzyeAZNYpXVCRJZfIQZEU58yxs8CV238rNs
Things you find stressful that other people don't notice.