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Poliovirus detected in sewage samples of 7 infected districts of Pakistan

ISLAMABAD, June 20 (Xinhua) — Wild poliovirus type 1 has been detected in sewage samples of seven already infected districts of Pakistan, the Pakistani Health Ministry said Thursday.

Nine environmental samples collected between June 3 and June 4 from Quetta, Chaman, and Pishin districts of southwest Balochistan province, Hyderabad, Mirpur Khas, and Karachi Keamari districts of southern Sindh province and Peshaw