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** ADVANCE FOR USE MONDAY, FEB. 21, 2011 AND THEREAFTER ** In this photo taken Sunday, Jan. 23, 2011, polio vaccination team members make their way through fog towards Tilkeshwar village for a vaccination campaign early morning, some 180 kilometers (113 miles) from Patna, India. An effective campaign by the government and international aid groups is finally driving polio out of India. In just five days last month, 2 1/2 million workers visited 68 million homes to inoculate 172 million children under 5 years old. Across India, one of four nations where polio remains endemic, only 42 cases were recorded in 2010, a drop of 94 percent from the year before. (AP Photo/Altaf Qadri)