<s>[INST] How common is dengue? [/INST] Dengue has become more common and widespread in the past 40 years. As of 2002, dengue fever is endemic in most tropical countries of the South Pacific, Asia, the Caribbean, the Americas, and Africa. Up to 100 million cases occur every year, with over 2 billion people at risk of contracting it.

Most cases of dengue fever in the U.S. have been linked to the patients' travel to endemic areas. The mosquito that transmits dengue fever is found in Texas and across the southeastern U.S., so there is a potential risk for dengue transmission. Sporadic outbreaks have occurred in the Gulf coastal area and in extreme south Texas. Source: TEXAS HEALTH AND HUMAN SERVICES. Link: https://www.dshs.texas.gov/mosquito-borne-diseases/dengue/dengue-faqs. Field: Infectious Disease. Disease: Dengue </s>