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On another call <a href=" http://www.radioliberdadedili.com/online-cytotechnology-degree-programs#maud ">cytotec vendita on line</a> First, we’re seeing the protective power of high immunity levels. Israel has one of the highest immunization rates in the world, which explains why the circulating virus has not resulted in a single case of paralytic polio. If immunity were low, we’d be seeing an outbreak, as we are in Somalia and as was the case in Tajikistan, which reported more than 450 cases of polio in 2010, eight years after the country had been declared polio-free.