For maintenance of polio eradication in polio-free countries, WHO conducts surveillance for cases of AFP and collects samples of sewage water to find any traces of polio viruses. In one such study in Hyderabad in April, out of 30 samples collected, one sample from Amberpet nala contained traces of type-2 VDPV. Lab tests have revealed that the virus has passed through human body and has undergone mutation or nucleotide change. Similar virus strains were detected in Delhi, Bihar and Gujarat. The Telangana government asked people not to panic, and called for a one-week special polio immunisation drive in Hyderabad, starting from 20 June, to vaccinate around 300,000 children.
Read more here: WHO Finds Polio Vaccine Spreading Polio In India – Truth Kings