At a special meeting Monday afternoon, the commissioners voted unanimously to approve the spraying following a letter from the county public health department stating "traditional mosquito abatement" had failed to stop the increasing number of cases, making "urgent aerial spraying" necessary. To prevent getting infected, people should wear insect repellent, avoid going out at dawn and dusk when mosquitoes are most active, wear long sleeves and long pants, and put screens on windows and doors. Symptoms include fever, headache, muscle weakness, fatigue and nausea, which in severe cases can progress to seizures, paralysis and even death.