Surgical masks © Belish | Dreamstime.com Only 4 out of the 16 masks sold in Switzerland that were tested passed all three tests conducted by a textile testing company, according to RTS. The testing, which included tests for air permeability, splash resistance and filtration, was conducted in laboratories run by Testex in Zurich and Vienna at the behest of RTS. Testing followed the standards recommended by the Swiss National Covid-19 Science Taskforce. There are...
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