人类生存和发展的历史，是一部与灾害和疾病斗争的历史。不管这些病害多么凶狠，最终都被人们所控制和战胜。从1973年至今，新出现并被确认的病毒及其所致疾病就有23种，有许多都是来势十分凶猛，不可一世的。例如，1992年10月，印度、孟加拉国和东南亚139新型霍乱大流行，有20 The history of human survival and development is a history of fighting disasters and diseases. No matter how fierce these diseases are, they are ultimately controlled and defeated by people. Since 1973, there have been 23 new and confirmed viruses and the diseases they cause, many of which are very fierce and incompetent. For example, in October 1992, there were 139 new cholera epidemics in India, Bangladesh and South East Asia, with 20