Eradication of mosquito 'unlikely'

Govt's 'war' on Zika virus threatened by every international traveler and import

In the 1940s and 1950s, the Brazilian authorities made such an assault on Aedes aegypti - the mosquito that spreads the Zika virus - that it was eradicated from Latin America's largest country by 1958.

But Aedes aegypti has returned, and now Brazil has launched another offensive against the pest, employing hundreds of thousands of troops to fumigate and educate people about how to eliminate its habitats. The assault is part of President Dilma Rousseff's "war" on the Zika virus, which can cause devastating birth defects.