Yellow fever the introduction of sugar plantations created the conditions for mosquito and viral reproduction, and subsequent outbreaks of yellow fever. Deforestation reduced populations of insectivorous birds and other creatures that fed on mosquitoes and their eggs. Although yellow fever is most prevalent in tropical-like climates, the northern United States were not exempted from the fever. The first outbreak in English-speaking North America occurred in New York City in 1668, and a serious one afflicted Philadelphia in 1793. English colonists in Philadelphia and the French in the Mississippi River Valley recorded major outbreaks in 1669, as well as those occurring later in
Tokyo Fever music video for "Tokyo Fever." Type B, which featured a yellow backdrop, contained the bonus track "Dilemma," its corresponding instrumental and the dance version of "Tokyo Fever." Type C, which had a pink backdrop, carried the bonus track "Gimme a call," its corresponding instrumental and a dance tutorial video for "Tokyo Fever." For "Tokyo Fever," the lyrics were written by Saeki Yuusuke and Japanese duo CLARABELL, with the rap portions written by Lead's rapper Shinya Taniuchi. "Bokura no Yogaakeru Made" lyrics were written by PALEO with the music written by BOY SKI MASK, DEY GON GET IT, along with PALEO.