ISLAMABAD: The pre­sence of poliovirus has been confirmed in seven distri­cts across all four provinces. The Regional Refer­ence Laboratory for Polio Era­dication at the National Institute of Health (NIH) tested sewage samples from nine districts, of which seven were found positive for the presence of poliovirus. A sewage sample from an area is the basic parameter used to identify the presence of the virus in … Continue reading Poliovirus detected in seven districts