children vaccinated with the oral polio vaccine. The boycott was endorsed by the governor of Kano State, and immunization was suspended for several months. Subsequently, polio reappeared in a dozen formerly polio-free neighbors of Nigeria, and genetic tests showed the virus was the same one that originated in northern Nigeria. Nigeria had become a net exporter of the poliovirus to its African neighbors. People in the northern states were also reported to be wary of other vaccinations, and Nigeria reported over 20,000 measles cases and nearly 600 deaths from measles from January through March 2005. In Northern Nigeria, it is a common belief that vaccination is a strategy created by the westerners to reduce the Northerners' population. As a result of this belief, a large number of Northerners reject vaccination. In 2006, Nigeria accounted for over half of all new polio cases worldwide. Outbreaks continued thereafter; for example, at least 200 children died in a late-2007 measles outbreak in Borno State. United States, measles (2005–) In 2000, measles was declared eliminated from the United States because the internal transmission had been interrupted for one year; the remaining reported cases were due to importation. A 2005 measles outbreak in the US state of Indiana was attributed to parents who had refused to have their children vaccinated. The Centers for Disease Control and Prevention (CDC) reported that the three biggest outbreaks of measles in 2013 were attributed to clusters of people who were unvaccinated due to their philosophical or religious beliefs. As of August 2013, three pockets of outbreakNew York City, North Carolina, and Texascontributed to 64% of the 159 cases of measles reported in 16 states. The number of cases in 2014 quadrupled to 644, including transmission by unvaccinated visitors to Disneyland in California, during the Disneyland measles outbreak. Some 97% of cases in the first half of the year were confirmed to be due directly or indirectly to importation (the remainder were unknown), and 49% from the Philippines. More than half the patients (165 out of 288, or 57%) during that time were confirmed to be unvaccinated by choice; 30 (10%) were confirmed to have been vaccinated. The final count of measles in 2014 was 668 cases in 27 states. From January 1 to June 26, 2015, 178 people from 24 states and the District of Columbia were reported to have measles. Most of these cases (117 cases [66%]) were