The Centers for Disease Control and Prevention recently updated its guidelines advising Americans to avoid such face masks, as they aren’t as effective in preventing the spread of“The purpose of masks is to keep respiratory droplets from reaching others to aid with source control. Masks with one-way valves or vents allow exhaled air to be expelled out through holes in the material.
"I know everyone wants comfort when wearing a mask. The key for protection is a good seal — thereby keeping as many infectious particles that we can from affecting other people. Sometimes that seal makes our glasses foggy or causes humidity. The problem with the valves is that although the prevent particles from coming in, they allow particles to come out — defeating the purpose of infection control. Masks with vent decrease the effectiveness of the seal,” he continued.
drjohnwhyte CDC gives contradictory advice on valved respirators. They recommend 624 models of valved N95 respirators to healthcare workers. Check out this article!
AskDrShashank drjohnwhyte Would it not be simpler to implement this if the production of vented masks was banned?
drjohnwhyte Spoiler: concluyeron diciendonos que No Protegen 🚫
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