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１９９８年间（注１）流感的主要病毒株为Ａ（Ｈ３Ｎ２）、Ａ（Ｈ１Ｎ１）和Ｂ，而在１９９７年１２月以来未再发现流感Ａ（Ｈ５Ｎ１）有感染人的情况。因此，１９９９年流行季节（南半球为冬季）使用的流感疫苗组成建议如下：（１）Ａ／悉尼／５／９７（Ｈ３Ｎ２）样病毒...
The major influenza strains in the year 1998 (Note 1) were A (H3N2), A (H1N1) and B, and no cases of human influenza A (H5N1) infection have been detected since December 1997. Therefore, the composition of the influenza vaccine used in the popular season of 1999 (winter in the southern hemisphere) is as follows: (1) A / Sydney / 5/97 (H3N2) -like virus ...