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by aeternum
1598 days ago
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The question is how effective masks are w.r.t. Covid. For this the test really needs to be seroprevalence, not just symptoms. Symptoms can be caused by many non-Covid causes like allergies or the common cold. The researchers state: > We selected the WHO case definition of COVID-19
for its sensitivity, though its limited specificity may imply that the impact of masks on symptoms comes partly from non-SARS-CoV-2 respiratory infections |
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