Japan tackles first dengue fever outbreak in 70 years.
Japanese officials are working to eradicate mosquitoes at Yoyogi park
Japan is battling its first outbreak of dengue fever in almost 70 years, with at least 22 people confirmed as being infected.
The health ministry said the cases were believed to have been contracted by visitors to Tokyo's popular Yoyogi Park.
An outbreak of dengue fever was last recorded in Japan in 1945. Continue reading the main story