Mosquitoes are one of the most common flying insects in the United States, and they can be found in almost every state. While many people associate mosquitoes with itchy bites, these insects can also transmit serious diseases, such as West Nile virus, Zika virus, and Dengue fever. To reduce the risk of mosquito-borne illnesses, it is recommended to use insect repellent and wear protective clothing when spending time outdoors, especially during dawn and dusk when mosquitoes are most active.

Flies are another common flying insect in the United States. While most species of flies do not pose a direct threat to human health, they can carry and transmit disease-causing pathogens, such as E. coli and Salmonella. Flies are often attracted to areas where food is present, so it is important to keep food covered and stored properly to reduce the risk of contamination.

While ticks are not technically flying insects, they are still a significant health risk in the United States. Ticks can transmit a variety of diseases, including Lyme disease, Rocky Mountain spotted fever, and Babesiosis. To reduce the risk of tick bites, it is recommended to wear protective clothing and use insect repellent when spending time outdoors in areas where ticks are common, such as wooded or grassy areas.