Mark, As you say
> It's effective if sick people are wearing them -- not well people. > And those in contact with the vulnerable especially health professionals. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/ec6ca3b6-b5c5-4f92-b759-99604d22ca24%40googlegroups.com.
