So far this year, the Lahore metropolitan area has recorded a few dozen cases of dengue fever, a mosquito-borne disease characterized by fever, headache, and joint pain. The number is significantly lower than in past years, thanks to a smartphone app created by computer scientist Umar Saif that allows officials to track all efforts to prevent the disease's spread. This includes photologging crews of sanitation workers as they clear out pools of standing water that can serve as mosquito breeding grounds.
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