Dengue fever (UK /ˈdɛŋɡeɪ/ or US /ˈdɛŋɡiː/), also known as breakbone fever, is an infectious tropical disease caused by the dengue virus. Symptoms include fever, headache, muscle and joint pains, and a characteristic skin rash that is similar to measles. In a small proportion of cases the disease develops into the life-threatening dengue hemorrhagic fever, resulting in bleeding, low levels of blood platelets and blood plasma leakage, or into dengue shock syndrome, where dangerously low blood pressure occurs.

Dengue is transmitted by several species of mosquito within the genus Aedes, principally A. aegypti. The virus has four different types; infection with one type usually gives lifelong immunity to that type, but only short-term immunity to the others. Subsequent infection with a different type increases the risk of severe complications. As there is no vaccine, prevention is sought by reducing the habitat and the number of mosquitoes and limiting exposure to bites.

Treatment of acute dengue is supportive, using either oral or intravenous rehydration for mild or moderate disease, and intravenous fluids and blood transfusion for more severe cases. The incidence of dengue fever has increased dramatically since the 1960s, with around 50–100 million people infected yearly. Early descriptions of the condition date from 1779, and its viral cause and the transmission were elucidated in the early 20th century. Dengue has become a global problem since the Second World War and is endemic in more than 110 countries. Apart from eliminating the mosquitoes, work is ongoing on a vaccine, as well as medication targeted directly at the virus.

Julian Miles "Jools" Holland OBE, DL (born 24 January 1958) is an English pianist, bandleader, singer, composer, and television presenter. He was a founder of the band Squeeze (1974-1980 & 1985-1990) and his work has involved him with many artists including Sting, Eric Clapton, George Harrison, David Gilmour, Magazine and Bono.

Holland is a published author and appears on television shows besides his own and contributes to radio shows. In 2004, he collaborated with Tom Jones on an album of traditional R&B music. He currently hosts Later... with Jools Holland, a music-based show aired on BBC2, on which his annual show Hootenanny, is based.

His great grandfather came from Ireland.

Holland played as a session musician before finding fame, and his first studio session was with Wayne County & the Electric Chairs in 1976 on their track "F*ck Off."

Holland was a founding member of the British pop band Squeeze, formed in March 1974, in which he played keyboards until 1981 and helped the band to achieve millions of record sales, before pursuing his solo career.