Virus cúm gia cầm H9N2-mối đe dọa mới
Theo kết quả nghiên cứu của một nhóm các nhà khoa học thuộc trườngĐại học Maryland, Mỹ, chủng virus H9N2 có thể biến đổi trở nên nguyhiểm, có khả năng lây lan nhanh hơn và là mối đe dọa mới đối với loàingười.
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