ไวรัส, มาลา, โลก, ไวรัสโคโรน่า, เตือนภัย, ความสนใจ, คุณหมอ, วิจัย, แบคทีเรีย, โควิด -19, อันตราย
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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