According to the United States' Centers for Disease Control and Prevention (CDCP), it was the worst year for West Nile virus since 2003.

BBC: US & Canada

In a 3-month period alone, the CDCP estimated patients with depression miss an average of 4.8 workdays and suffer 11.5 days of reduced productivity.

FORBES: Is your employee suffering? Telltale signs of depression in the workplace

According to the Centers for Disease Control and Prevention (CDCP) report, depression results in 200 million lost workdays in the U.S. annually, and consequently, employers could lose USD17-44 billion in productivity and insurance payments.

FORBES: Is your employee suffering? Telltale signs of depression in the workplace