Harris County Public Health’s Mosquito and Vector Control Division is Activating Evening Spray Operations HOUSTON – Harris County Public Health’s (HCPH) Mosquito and Vector Control Division (MVCD) has confirmed that a Culex quinquefasciatus mosquito sample has tested positive for West Nile virus (WNV) in northwest Harris County. In response, MVCD is activating evening spray operations tonight at dusk in the area where the virus-positive mosquito sample was found and in surrounding areas. These efforts aim to reduce the […]