An Aedes aegypti mosquito, which carries the Zika virus,  photographed through a microscope at the Fiocruz institute in Recife, Pernambuco state, Brazil.  Photograph: Felipe Dana/AP

A case of Zika virus infection transmitted by sex, rather than mosquito bite, has been discovered in Texas. The Dallas County health and human service(...)

An Aedes aegypti mosquito  in a laboratory in Campinas, Brazil, February 2nd, 2016. Photograph: Paulo Whitaker/Reuters

A new method to render male mosquitoes infertile by nuclear radiation could help reduce populations of insects carrying the Zika virus linked to thous(...)

 President Nicolás Maduro: The opposition  fears he  will  bypass the assembly’s decision by having the decree powers confirmed by the country’s top court. Photograph: EPA

Venezuela’s opposition-controlled national assembly has rejected a decree granting emergency economic powers to president Nicolás Maduro, deepening th(...)

Fumigating to prevent dengue, chikunguya and Zika virus at El Angel cemetery, in Lima, Peru. Photograph: Martin Mejia/AP Photo

Pregnant women are being advised to consider postponing travel to areas affected by Zika amid global concern at the spread of the mosquito-borne virus(...)

A man fumigating a house in Mexico City, Mexico as part of the country’s campaign against the Zika virus. Photograph: Mexican Secretary Office of Health/EPA

The US Centers for Disease Control and Prevention (CDC) extended its travel warning to another eight countries or territories that pose a risk of infe(...)

People queue to try to buy corn flour and rice, outside a supermarket in Caracas  after Venezuela’s socialist government decreed an “economic emergency”. Photograph: Carlos Garcia Rawlins/Reuters

His government’s incompetence brutally exposed by the crash in the oil price, Venezuela’s president Nicolás Maduro has declared an “economic emergency(...)

Newly-elected opposition deputy Juan Requesens   argues with Chavista deputies during the new parliament’s swearing-in ceremony in Caracas:  a Chavista-dominated court ordered the temporary suspension of the mandates of four new deputies, three from the opposition, after their victories were questioned by the ruling socialists.  Photograph: Juan Barreto/AFP/Getty Images

Venezuela’s main opposition alliance took control of the country’s national assembly yesterday amid a deepening power struggle between it and the cou(...)

UN secretary general Ban Ki-moon, French foreign affairs minister Laurent Fabius and French president François Hollande celebrate the adoption of a climate change deal in Paris. Photograph: Guillot/AFP/Getty Images

‘It always seems impossible until it is done.” Thus spoke French foreign minister Laurent Fabius, quoting another author of the impossible, Nelson Man(...)

Argentina’s president-elect Mauricio Macri: wants a free trade deal between Mercosur and the Pacific Alliance trade bloc of Mexico, Peru, Chile and Colombia. Photograph: Enrique Marcarian/Reuters

Mauricio Macri’s swearing-in as Argentina’s first democratically elected right-wing president takes place on Thursday amid an unedifying spat with the(...)

Newly-elected Venezuelan president Nicolas Maduro. Photograph: AFP/Getty Images

Venezuela’s ruling socialist party has been crushed in mid-term elections held on Sunday as the country’s self-styled Bolivarian revolution suffered i(...)