A. aegypti and<unk>  distribution in 2006 ----<unk>  deaths per million persons in 2012<unk>  is common in more than 120 countries. In 2013 it caused about 60 million symptomatic infections worldwide, with 18% admitted to hospital and about 13,600 deaths. The worldwide cost of<unk>  case is estimated US$9 billion. For the decade of the 2000s, 12 countries in Southeast Asia were estimated to have about 3 million infections and 6,000 deaths annually. In 2019 the Philippines declared a national<unk>  epidemic due to the deaths reaching 622 people that year. It is reported in at least 22 countries in Africa; but is likely present in all of them with 20% of the population at risk. This makes it one of the most common vector-borne diseases worldwide. Infections are most commonly acquired in urban environments. In recent decades, the expansion of villages, towns and cities in the areas in which it is common, and the increased mobility of people has increased the number of epidemics and circulating viruses.<unk> , which was once confined to Southeast Asia, has now spread to southern China in East Asia, countries in the Pacific Ocean and the Americas, and might pose a threat to Europe. Rates of<unk>  increased 30 fold between 1960 and 2010. This increase is believed to be due to a combination of urbanization, population growth, increased international travel, and global warming. The geographical distribution is around the equator. Of the 2.5 billion people living in areas where it is common 70% are from the WHO Southeast Asia Region and Western Pacific Region. An infection with<unk>  is second only to malaria as a diagnosed cause of<unk>  among travelers returning from the developing world. It is the most common viral disease transmitted by arthropods, and has a disease burden estimated at 1,600 disability-adjusted life years per million population. The World Health Organization counts<unk>  as one of seventeen neglected tropical diseases. Like most arboviruses,<unk>  virus is maintained in nature in cycles that involve preferred blood-sucking vectors and vertebrate hosts. The viruses are maintained in the forests of Southeast Asia and Africa by transmission from female Aedes mosquitos—of species other than A. aegypti—to their offspring and to lower primates. In towns and cities, the virus is primarily transmitted by the highly domesticated A. aegypti. In rural settings the virus is transmitted to humans by A. aegypti and other species of Aedes such as A. albopictus. Both these species had expanding ranges in the second half of the 20th century. In all settings the infected lower primates or humans greatly increase the number of circulating<unk>  viruses, in a process called amplification. One projection estimates that climate change, urbanization, and other factors could result in more than 6 billion people at risk of<unk>  infection by 2080.
Dengue fever
Leptospirosis
Chikungunya
Malaria
Blackwater fever
Yellow fever
Ross River fever
Viral hepatitis