KSAT 12: It’s all about size! Why experts say it’s false to say masks don’t filter out coronavirus because odors can get in

Some posts circulating online are claiming that since you can smell things like food or smoke through a cloth mask, the covering will not filter the coronavirus. Dr. Fred Campbell, General and Hospital Medicine, associate professor of medicine, says that’s false. He discussed the effectiveness of cloth masks and how they help filter out the COVID-19 virus.

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