Surgical masks are not designed for use as particulate respirators and do not provide as much respiratory protection as an N95 respirator. ... Most surgical masks do not effectively filter small particles from the air and do not prevent leakage around the edge of the mask when the user inhales.
No, that is False. They normally occur in the layer called the Troposphere. The Troposphere is where all the plains and the jets fly. The Mesosphere is too high,