Shouldn’t only sick people wear masks?
Patients without symptoms pose a risk of infecting others, so it’s not enough to wait until you have symptoms to wear a mask.
Three recent studies show that nearly half of patients are infected by people who do not themselves have symptoms—thus they aren’t even coughing or sneezing yet, but they can spread the disease just by talking in close proximity to someone else.
Source:masks4all.co...
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