However, health experts warn of millions of human cases if the virus mutates into a form that spreads easily from person to person.
However, health experts warn of millions of human cases if the virus mutates into a form that spreads easily from person to person.
不过，卫生专家警告说，如果禽流感病毒变异成能够轻易在人之间传播的毒株，就会有数以百万计的人染病。