Yellow fever as an outbreak in brown howler monkeys, which serve as a sentinel species for yellow fever, that then spread to men working in the jungle. No cases had been transmitted between humans by the "A. aegypti" mosquito, which can sustain urban outbreaks that can spread rapidly. In April 2017, the sylvan outbreak continued moving toward the Brazilian coast, where most people were unvaccinated. By the end of May the outbreak appeared to be declining after more than 3,000 suspected cases, 758 confirmed and 264 deaths confirmed to be yellow fever. The Health Ministry launched a vaccination campaign and was concerned
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.