GIVEN that the PM and others have suggested the persevering with use of face coverings I assumed that I might do a quick survey of which three-layer medical masks proceed to be available for purchase and which is greatest.
After visiting 4 excessive road pharmacies to verify the packaging, I discovered that each producer boasted of a 98 per cent bacterial filtration fee. None talked about viral filtration – the very info a buyer must know to make a good selection. Why? As a result of they don’t should!
Isn’t it time, after 16 months, for producers to be made to provide this important info? It can’t be as tough or costly to do as making a vaccine.
One retailer pharmacist advised me that the Covid virus particle is over 50 occasions smaller than the common bacterium cell, so one of many masks can be as efficient as a aim internet stopping a marble.
A cynic would possibly assume that producers have one thing to cover.
D Duell, Durham.
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