Via Xinhua :
" A government health official said that no substantial mutations have been detected in the strains of influenza virus currently circulating throughout the country.
Shu Yuelong, director of the Chinese National Influenza Center affiliated with the Ministry of Health, said at a Wednesday press conference that this season's flu vaccine is still acceptable for use against the virus strains currently in circulation.
Information collected from China's influenza monitoring network has revealed an increase of flu cases since January this year, with the number of cases currently at its peak level, Shu said.
However, Shu said the total number of cases remains within an acceptable range.
Shu said influenza B is the most predominant flu strain in China this year."
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