in recent years, the united states a week bad flu spread to hundreds of deaths, infection is rapidly increasing in the treatment and prevention of the disease.the party - 2injection is the most effective.therefore, prevention and control experts in several countries for the purpose of the party - 2 injection was to see, but not in the same city and malicious virus infectious disease, the symptoms of a cold. it first appeared in front of the other in the treatment of immune system. the river used to this end. ")
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