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[高清字幕]Health Report - World Health Organization Warns of Polio in Pakistani City

来源:慢速英语   时间:2014-03-05 09:03:56

Health Report - World Health Organization Warns of Polio in Pakistani City

Researchers found that almost every Pakistani case of polio reported in 2013 could be linked to the virus in the city of Peshawar.

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