Why there are more swine flu patients in japan ?

by styeb
Article by flyingstyle
In the past one week, the number of new H1N1 patients in japan reached 1.14 million, broke through the 1 million mark for the first time. It can be said that Japan has entered a stream of national-scale outbreak period. Children under the age of 14 become the major infected groups, accounting for 70% of the total number, and there have been many cases of death. The number of influenza patients in Japan has now reached more than 200 million, 43 people have

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