Flies and insects might just seem like an outdoor annoyance, but some of these tiny pests are tiny dangers in disguise. The Center for Disease Control and Prevention states that insects that spread vector-borne diseases—such as West Nile virus, Lyme disease, and Zika—are a serious hazard for outdoor workers. Mosquitos and ticks are common carriers for these illnesses and may be hiding in your yard. To avoid getting bitten, wear clothes that cover your arms and legs and spray yourself and your garments with bug spray. If you do think a bug got you, learn the signs and symptoms of the diseases above and consult your doctor as soon as possible.