Many wear masks , but those cheap disposable masks

Many wear masks , but those cheap disposable masks may work if wear properly ...

Must cover nose and mouth , ,studies were done in the hospitals, how well they protect healthcare employee..not very well except splash of fluids ...

Those masks are not fitted or sealed , they have gaps ...
so not all air is filtering...but will block most large respiratory droplets...
But you cant put your hand inside at any time ...