This week, the New York City health department began spraying pesticides to kill mosquitoes and reduce the risk of West Nile virus, which has infected at least six people in the city so far. The infection rate typically peaks in August, according to the health department. At least 33 states have reported cases of mosquito-borne illnesses so far this year, according to the CDC. Read more: https://abcnews.visitlink.me/GS-5E0 | ABC News