ไวรัส, แบคทีเรีย, การติดเชื้อ, โรค, มาลา, ไวรัสโคโรน่า, วัคซีน, ทางการแพทย์, ไข้หวัดใหญ่
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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