A resurgence of dengue fever in Latin America has hit Buenos Aires. On 9 April the city confirmed that the number of cases had exceeded 150.

Argentina is in the middle of its worst dengue epidemic since records began almost a century ago. Nationwide, more than 10,000 cases have been confirmed and specialists estimate a true total of about 30,000. The country is also dealing with its first reported cases of the potentially lethal haemorrhagic form of the disease. Neighbouring Bolivia has been hit by as many as 114,000 dengue cases this year.

Dengue has become the world's most widely spread vector-borne disease over the past decade, according to Ricardo Gürtler, a dengue researcher at the University of Buenos Aires. Largely driven out of Latin America in the 1950s and 1960s, dengue's comeback has been linked to factors such as climate change, urbanization — which has been particularly rapid in Latin America — and decreased use of pesticides that reliably kill the mosquito vector.