Use Face Mask to Prevent Sickness - By Dr Willie Ong 46

Use Face Mask to Prevent Sickness Video By Dr Willie Ong #46 1. Face mask can help prevent common infections like colds, flu and some viruses. 2. Respirator or N95 mask can protect against tuberculosis, flu epidemic and severe air pollution. 3. Know how to use them. WATCH my video: /watch/0G1kPj-xPQrxk

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