In 2014, many Caribbean nations experienced an outbreak of Chikungunya, a mosquito-borne disease for which there is not a vaccine.
Over one million people in the western hemisphere contracted chikungunya in 2014—an unprecedented number. While only a handful of cases are reported in the United States during an average year, nearly 2,000 tourists came home with the disease last year.
Chikungunya garnered additional attention when actress Lindsay Lohan contracted the disease on a vacation to French Polynesia. Lohan tweeted and posted Instagram photos mentioning the virus and warning others to use bug spray.