Results are just in at the National Emergency Operations Centre offices in Islamabad, Pakistan and the news is good. Environmental samples taken across Pakistan found no trace of the polio virus, the first time all the samples were negative. According to UNICEF Team Lead Aidan O’Leary on Friday, April’s envirnomental samples were all negative. About 9 percent of samples taken earlier in the year were positive. Just two years ago in 2014, fully one-third of samples were positive.