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"Wearing a face mask was a protective factor against influenza infection." The key word there is influenza.
by DrScump 7y ago
"Wearing a face mask was a protective factor against influenza infection."
The key word there is influenza.
- factsaresacred 7y agoIt's about the size of the particles (both COVID-19 and flu are 80–120 nm) not the type of virus. Besides, the other links concern a SARS virus.