North Americans are currently at risk from numerous vector -
borne diseases, including Lyme, 69,70,71,72,84 dengue fever, 73,74,75,76,77,78 West Nile virus, 79,80 Rocky Mountain spotted fever, 81 plague, and tularemia.198 Vector -
borne pathogens not currently found in the United States, such as chikungunya, Chagas disease, and
Rift Valley fever viruses, are also threats.