Joe Conlon, technical adviser for the American Mosquito Control Association, discusses challenges associated with fighting the mosquito that carry the Zika virus during the association's annual conference in Savannah, Georgia, on Monday, Feb. 8, 2016. Experts say the mosquito species known to spread the Zika virus live and breed in people's homes and yards, making them tough to reach with sprays and often requiring labor-intensive door-to-door interventions. (AP Photo/Ross Bynum)