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. 2020 Jun 8;88:1–5. doi: 10.1016/j.bbi.2020.05.060

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Fig. 1 — Evolution of ‘The Mask’. Starting from a beak-shaped plague mask in 1800s (A), it has evolved from a bulky industrial mask in 1900s (B) to the simple surgical mask and N-95 medical grade respirator (C). The current scarce availability of a surgical mask and N95 respirator has prompted the governments to recommend even face covers from any available cloth (D) material!