Re: Re. Poor Old Sniffler
"they were considering locking the doors until the alcohol gel etc has been used to reduce spread of infection despite these actually making things worse by killing off all but super-resistant bugs?"
Some studies suggest that those hand sanitizers are bad because many pathogens start from benign virus' that your body will still recognize, attack and remember what to do if you see them again when they might be in a health problematic form.
It's the same issue that crops up when you travel to a place/country you haven't been to before. Your body isn't acclimated to the local bugs, so you get "traveller's trots" or another health problem. The next time you go back, you aren't affected or to much less of a degree. If you are never exposed to anything, your immune system won't know what to do when you are.
Good old soap and water does the trick.