[单项选择] The Asian Flu Virus In 1957, a doctor in Singapore noticed that hospitals were treating an unusual number of influenza-like cases. Influenza is sometimes called "flu" or as "bad cold". He took specimens from the throats of patients in his hospital and was able to find the virus of this influenza. There are three main types of the influenza virus. The most important of these are types A and B, each of them having several sub-groups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus group A, but he did not know the sub-group. He reported the outbreak to the World Health Organization in Geneva. W. H. 0. published the important news alongside reports of a similar outbreak in Hong Kong, where about 15%-20% of the population had become ill. As soon as the London doctors received the package of throat samples, they began the standard tests. They found that by reproducing itself at a very high speed, th
A. was a killer
B. was very weak
C. could reproduce very quickly
D. died very fast