The best way to prevent diseases that are spread by mosquitoes is to protect yourself from mosquito bites: use
mosquito repellent on clothes and exposed skin when going outdoors (especially at dawn and dusk), and wear long sleeves and pants for extra protection. You can also keep biting mosquitoes from breeding near your home by draining standing water around your yard.
Annual Risk of Mosquito Bites and Disease Transmission in California
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