โควิด -19, โควิด, หน้ากาก, ไวรัสโคโรน่า, การระบาดกระจายทั่ว, แมนฮัตตัน, สหรัฐอเมริกา, ฤดูหนาว, 2022, วิจัย, ทดสอบ
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