I hope you feel better soon, Tiggerblue, but my own policy on travelling long distances to shop is exactly the opposite of yours.
My local Co-op is stuffy and oppressive at the best of times, despite the air conditioning they fitted a while back, and the aisles are very narrow. So I simply don't feel safe shopping in there.
Instead I undertake a 30-mile round trip to get to Waitrose. It's a flagship store for them, being the only one in the country that's been purpose-built to include both Waitrose and John Lewis within the same building. (Obviously, the John Lewis part is currently closed). So it's got wide, spacious, airy aisles, where I feel that the air that I'm breathing is far less likely to be contaminated than in the Co-op down the road.