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Map shows the Mexican state of Sonora, and the inset map in the upper left corner shows the state’s geographical location in the country. Numbers indicate the approximate location of the two described borreliosis cases in Sonora. The map was modified from http://www.beta.inegi.org.mx/app/mapas/?ag=26 and used under the free use terms by INEGI, Mexico. INEGI, Instituto Nacional de Estadística Geografía e Informática.
