มาลา, ประทับ, ที่ติดเชื้อ, การติดเชื้อ, ความสงสัย, โควิด, โรค, ตัก, การตรวจสอบ, ทดสอบ, แบคทีเรีย
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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