These opportunities, in turn, will persist as long as the virus continues to circulate in birds, and this situation could endure for some years to come.
而只要病毒继续在鸟类传播，人类感染的机会就始终存在，并且这种情况还将延续数年。
These opportunities, in turn, will persist as long as the virus continues to circulate in birds, and this situation could endure for some years to come.
而只要病毒继续在鸟类传播，人类感染的机会就始终存在，并且这种情况还将延续数年。
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