Islamabad [Pakistan], February 4 (ANI): As many as 28 environmental samples collected from Pakistan’s 19 districts in January and two collected from Quetta and Khuzdar in December have tested positive for wild poliovirus type 1 (WPV1), Dawn reported. As per an official of the Regional Reference Laboratory for Polio Eradication at the National Institute of Health (NIH), the virus was found in four sewage samples each from Quetta and Karachi East, two samples each from Chaman, Peshawar, Karachi South and Karachi Keamari, and one each from Karachi Korangi, Karachi Central, Karachi Malir, Jamshoro…