I challenge any of the self justifying contributors to this thread to produce evidence that face masks are not effective.
I shall produce evidence to the contrary, and yes I know how hard it is to get proper randomised trials in epidemiological settings and that I am linking to a preprint which was yet to be peer reviewed.
I open the bidding with this paper from the Royal Society and British Academy
https://royalsociety.org/-/media/po...a=en-GB&hash=A22A87CB28F7D6AD9BD93BBCBFC2BB24
which states "Cloth face masks and coverings for the general public are effective in improving: i) source protection, i.e., reduced virus transmission from the wearer when they are of optimal material and construction and fitted correctly; and ii) wearer protection, i.e., reduced rate of infection of those who wear them".
And if you don't like that there is the huge meta study reported in the Lancet here
https://www.thelancet.com/article/S0140-6736(20)31142-9/fulltext
which supports social distancing preferably at 2 metres and also says that "The use of face masks was protective for both health-care workers and people in the community exposed to infection, with both the frequentist and Bayesian analyses lending support to face mask use irrespective of setting".