“It’s so startling that we are here in this moment and we don’t have that information.”That may change soon. Despite that, the agency acknowledges that there is still rampant fraud, with countless companies stamping ‘KN95” on masks that do not meet the FDA standards. The surgical mask style is often copied by companies that sell imitations which do not offer the same level of protection. Just about any mask is better than no mask, public health experts say. The filtration efficiency percentages are based on a product’s efficiency at filtering particles measuring 0.3 microns, which, as the generally most penetrative particles, are standard for NIOSH tests.

Source: bd News24 December 17, 2020 04:07 UTC