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No. Sterile masks mean that the new unopened masks are bacteria-free. But people themselves are carriers with bacteria on our skin, in the nasal cavity and mouth. Once we wear the mask, it gets infected with bacteria. Therefore, a sterilized mask only indicates that it is clean, while it does not mean that it has improved protective performance. Thus, medical masks that meet China's standards do not require product sterilization. Instead, the qualified list excludes some specific pathogenic bacteria, and total amount of fungal colonies are limited.
