@Derbygerbil
It was no big deal - both locals and ex pats just put on the masks and got on with it! I have not been shopping apart from the supermarket and some pottery stores (I have a nasty pottery habit that developed during lockdown!) oh - and Ikea and a few home stores. But not clothing shops etc. But that is my choice.
Everyone wears the masks with the occasional run outside to get some fresh air and then back into the shop again. Yes - it is definitely not comfortable, but we wear it because we knew if the surgeons wear the damn masks for hours at a time performing complicated operations, we were surely able to do the same to pick up a loaf of bread and two bottles of wine ...
I started off with a washable mask which was quite thick, and have now moved to the disposable surgical masks which are easier to wear in terms of breathability. My glasses get a bit steamed up sometimes as it is quite hot here at the moment.
So in response, people are shopping less, but that is mainly because in the Algarve we apparently have 200% unemployment because of the non airbridge from the UK.