In many instances, we humans are subject to our ignorance. Info copied from from a CDC/NIOSH publication
Surgical Mask
Cleared by the U.S. Food and Drug Administration (FDA)
Fluid resistant and provides the wearer protection against large droplets, splashes, or sprays of bodily or other hazardous fluids. Protects the patient from the wearer’s respiratory emissions. Does NOT provide the wearer with a reliable level of protection from inhaling smaller airborne particles and is not considered respiratory protection.
N95 Respirator
Evaluated, tested, and approved by NIOSH as per the requirements in 42 CFR Part 84. Reduces wearer’s exposure to particles including small particle aerosols and large droplets. Filters out at least 95% of airborne particles including large and small particles
