We will not have a vaccine or adequate supplies of an antiviral to combat bird flu if it occurs in the next three years. WHO stages the progress of a pandemic.
假如禽流感在未来3年内发生 我们是没有疫苗或足够的抗病毒药物来与之进行搏斗的 世界卫生组织在记录着病毒的发展情况