Bird flu can also cause sudden death. Wild birds have carried the virus across Asia and into Europe. Once farm birds become infected, the disease spreads quickly.
Bird flu can also cause sudden death. Wild birds have carried the virus across Asia and into Europe. Once farm birds become infected, the disease spreads quickly.
禽流感也可能导致猝死。野生禽类在亚洲携带着病菌并带入了欧洲。一旦农场饲养的禽类被感染了，该疾病会传播的更快。