It grows by the person and a new virus of the collection in the Yasui mutation or China.

When it became easy to grow to the virus gathered from the patient with a new influenza in the sea city in China in the person, and the mutation with the possibility that pathogenesis increases was found, Kawaoka Gihiroshi (regulus hill and stopping fathom) professor of University of Tokyo Institute of Medical Science clarified the 19th.

Besides, the Kawaoka professor is speaking though a similar virus is not found so far, "It is necessary not to expand the virus with this mutation or to monitor carefully".

This virus was severed by the female patient of 22 years in Shanghai City in May. The female malady has recovered.

The gene named PB2 makes the protein that takes part in the virus replication among eight genes of the virus. In this virus, it differed from the new virus that had been gathered up to now in all parts of the world, and the 627th amino-acid of the PB2 protein had replaced no "Glutamate" and "Lysine".

It is assumed that it becomes easy to grow for here to become a lysine by bird's virus by nursing (nurse), and this part is a lysine in the a type influenza virus that becomes popular by the person every year.

The Kawaoka professor is assuming that he or she wants to affirm whether pathogenesis increases by this mutation by the animal study.

The genetic evidence of the virus is open to the public in the data base of the virus of the United States.

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