In Germany, due to the Corona pandemic, the government requires everyone to wear a mask over their mouth and nose in public when within enclosed spaces like supermarkets or public transportation.
Nevertheless, some people do not wear a mask (or do not wear it correctly), endangering the purpose of that measure. Those people benefit from everyone else not spreading the virus while potentially spreading it themselves.
Therefore, my question is, what's the best way to remind people in the public to wear their mask correctly? Taking into account that some may have valid reasons, see below.
Please also do a frame challenge, if the most appropriate way would be to not say anything about it at all.
Valid reasons not to wear a mask and not having bad intent:
- Medical contra-indication of wearing a mask, confirmed by medical doctors (strong reason)
- Foreigners on a visit (from Switzerland or the Netherlands), that might not know and are not prepared to bring a mask for their visit (weak reason, but one would want to be nice to visitors)