ความเหงา, ปลีกตัว, การป้องกัน, ออกโรง, เชื้อโรค, การติดเชื้อ, อันตราย, กลัว, ความไม่มั่นคง, ชีววิทยา, โรค
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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