BRUSSELS, Oct 23 (Xinhua) -- Europe has seen a sharp rise in cases of highly pathogenic avian influenza (HPAI), also known as the bird flu, since September, forcing governments to raise alert levels ...

什么是猪流感？What is Swine Influenza? 猪流感(Swine Influenza, swine flu)是猪的一种呼吸道疾病，它的病原是一种能造成周期性爆发的A型流感病毒。猪流感病毒的致病率很高，但猪的死亡率低。猪流感病毒在全年都有可能传播，但大部分会在深秋和冬季月份爆发，这一点 ...