The inoculation rate for Chinese children has reached well over 85 percent in the nation's 2,829 counties and China's next step in its immunization campaign is to eliminate poliomyelitis by 1995.In...
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The inoculation rate for Chinese children has reached well over 85 percent in the nation's 2,829 counties and China's next step in its immunization campaign is to eliminate poliomyelitis by 1995.In...