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masks have become indispensable in the last few months: it’s proven its effectiveness against the spread of the new coronavirus , the Covid-19 , above all, to protect others in the event that we are all a focus of infection. However, there are many options and growing questions about its effectiveness, especially with the fabric.
Now, new research from the Duke University (EE. UU.) shows that through a simple laser device it is possible to compare how good they are in their duty 14 masks of different types , from the sanitary and surgical up the effectiveness of put our with a simple wool scarf. And the results are amazing.