N-95 and KN 95 mask is what should be used
Latest Lab study attached showing N95 & KN95 offer best filtration, surgical masks are middling, cloth & bandana by themselves not so good. Doubling up surgical masks or cloth over surgical greatly improves filtration. U-shaped curves because ~300 nm (0.3 μm) is the hardest size to remove.
This means what ACGIH data attached shared by LocalCircles a few weeks ago holds true. Everyone must pay attention. A lot more can be done in terms of activity opening with protection. more
There is no need for wearing surgical mask for general public as long as they wear the mask properly when out in public places. Avoid crowded and confined places more
Only plain N95 and KN 95 is good and not those with the ventilator more
Will inhalation resistance reduce air uptake to the wearer of the Mask. Particularly, the washed cloth masks are supposed to develope. more
What do numbers in 'RED' signify? more
Pl. Follow the guide line strictly by yourselves. Peoples will see their own, Not asked for expert comments & research papers. CORONA is not observed in Pakistan & Afghanistan. more