Qapla
Engineer
Over 50 nurses at the hospital where my wife is employed all wore masks and came down with the virus
How many nurses work at this hospital? If there are only 55 nurses, that is a very high percentage ... however, if there are 500 nurses, it is only 10% who got infected in a C-19 rich environment.
In most public places where masks had been worn the concentration of infected people was nowhere near the number of infected people in a hospital full of C-19 cases. The shear number of C-19 cases in one area makes it difficult for even the most extreme protection to be 100% effective.
The fact that cases have risen in areas where masks were discarded as soon as people were told they were no longer "required" even though they remained "recommended" should indicate that masks do offer some protection - and some is far better than none.