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Claire McCall, right, gives patient Julianna Vega a checkup at the... News PhotoDallas,Giving,Gulf Coast States,Healthcare And Medicine,Horizontal,Medical Exam,Patient,Texas,USAPhotographer Collection: Tribune News Service 2012 MCTClaire McCall, right, gives patient Julianna Vega a checkup at the Agape Clinic in Dallas, Texas, on August 21, 2012. McCall suffers from West Nile virus symptoms four years after first contracting the virus. (Joyce Marshall/Fort Worth Star-Telegram/MCT via Getty Images)