If an article written by Steve Waterson in the Weekend Australian December 24-26 last year is correct (the relevant part is a bit lengthy to quote here) according to "a Scientist who advises the British Goverment's SAGE committee on airborne transmission of the virus" it is somewhat pointless even wearing the mask!
According to this Scientist, the size of the material gaps in the blue surgical masks are up to 1000 times greater than the size of the virus! And cloth-mask gaps can be 500,000 times the size.
I have been told much the same by a few Medicos.
