CDC reports worst West Nile virus outbreak in the U malegra effects .S. Earlier this year’s mild winter and wet spring could possibly be adding to the worst West Nile virus outbreak since the disease was initially detected in the United States in 1999. According to the Centers for Disease Control and Prevention, there have been more cases of the virus up to now this whole year than any year. As of 14 August, almost 700 cases had been reported across the nation, including 26 deaths. This year also marks the earliest reported case of West Nile virus in NJ. ‘Mosquitoes become infected if they feed on contaminated birds. Normally, the number of mosquitoes decreases through the cold months greatly, with a little proportion of mosquitoes surviving, or ‘overwintering.’ This year, with a gentle winter, even more mosquitos survived and so we’re seeing a bumper crop,’ explains Dr.