听力原文： The World Health Organization warns between 25 and 35 percent of the world population could be affected by a human influenza pandemic, but the WHO says most people would survive. Health experts are meeting at the World Health Organization in Geneva to map out a plan of action to combat the possible spread of avian flu. The World Health Organization Global Influenza Program Director Klaus Stohr says between two and seven million people would die from a mild pandemic and up to 28 million would be hospitalized. He adds everything has to be put into perspective. The WHO calculation is based on the prospect of a mild influenza outbreak, such as those which occurred in 1957 and 1968. Those pandemics killed three million people. It acknowledges that deaths could skyrocket in the event of a severe influenza pandemic, such as the one that swept the world in 1918, killing more than 40 million people. Health experts meet in Geneva to