I think you can choose to wear a mask but where the issue of their efficacy is extremely contentious, it seems divisive to accuse others of being selfish or irresponsible. They may be both these things or perhaps just less anxious and more rational depending on your views on masking.
So I, in my covid positive status right now, am not exercising responsibility by masking around others to help them avoid the same as I am suffering? (Well I would be masking if I could leave my bed). Nor others whom are particularly vulnerable choosing to wear one To avoid consequences to themselves of being exposed?
My choice of the word responsibility referred to those choosing to use them. If you want to defensively apply the reverse argument I’m not going to argue with you. I’d agree, but that isn’t what I said. And I think this is pots and kettles with you now calling me irrational and anxious. 4 days in patient treatment for me this week proves risks are still significant to some, even if we don’t know who ahead of time.
Evidence is strong (admittedly not 100% effective - due to compliance, quality and fit mostly) for masking whatever those that choose not to use them believe, imo.
I’m not going to debate topic this further with you. Our positions are clear. And long have been.
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The op asked for information about the practical use of masks, not judgement or not so subtle comments about “requirements” which are in fact still in place in some medical settings. Its not known the reasoning behind the choice being made and we need not speculate in order to answer the question asked.