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One year into the pandemic, there are still no filtration standards or labeling requirements for masks — even as a highly transmissible variant of the virus gains a foothold.
Source: Pasadena Star NewsCategories: Healthcare Professionals, Latest HeadlinesTweet
COVID Q&A: How effective is your #Mask? How to protect against contagious #CoronavirusVariant. https://t.co/jggOfQgw9F #GetUsPPE