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For the first time in more than a year, poliovirus was discovered in Karachi’s sewage line.

The National Polio Laboratory at Pakistan’s National Institute of Health (NIH), Islamabad, verified on Saturday that the Wild Poliovirus Type-1 (WPV1) was found in an environmental sample taken from a sewage line in Karachi’s Landhi neighbourhood in August.

This was the first positive environmental sample from Sindh this year, according to the federal ministry of national health services officials quoted by The News.

In Pakistan, there have been up to 11 confirmed cases of the poliovirus so far this month alone, bringing the year’s total number of cases to 22. Five of the 11 cases discovered in August came from Khyber Pakhtunkhwa, five from Punjab, and one from Sindh.

Officials from the federal government stated that the environmental sample from the Landhi neighbourhood of Karachi’s Bakhtawar Village that was determined to be positive on August 23 was taken.

“This is Karachi’s first successful environmental sample in 2022. The most recent Karachi positive sample was reported in May 2021. In the district, the final case of wild poliovirus was documented in June 2020. The most recent polio campaign in the district was carried out from August 15 to August 21, according to an official.

In 2022, KP obtained thirteen positive environmental samples, including seven from Bannu, three from Peshawar, two from Swat, and one from Nowshera.Seven positive samples have been taken in Punjab, including three each from Bahawalpur and Sialkot, two each from Rawalpindi and Lahore. There is one positive sample each from Karachi and Islamabad.

One of the 22 positive samples was taken in April 2022, two in May, one in June, seven in July, and eleven in August 2022, according to the official, who also noted that 65 positive environmental samples were found across the nation in 2021.