Cases of West Nile virus have been reported. A total of 222 cases are reported nationwide as of a recent date. Certain groups are more at risk, including older outdoor workers and people with weakened immune systems. Symptoms can include headaches and nausea, but many people will not develop symptoms.

Further details are available from the source. The number of cases in Texas is also reported.

A health expert provides more information on the risks and symptoms associated with the virus.