A researcher examines eggs of the
Aedes aegypti mosquitoes, at a laboratory of biotech company Wolbito do Brasil in Curitiba, Brazil, on March 19. AFP
Brazilian scientist Luciano Moreira tenderly handles a glass box of swarming mosquitoes infected with a bacterium that blocks the transmission of dengue.
These mosquitoes have protected millions in Brazil, but the debilitating disease is spreading faster than the insects can be bred and shipped around the country.
Climate change "accelerates the spread of the virus. In the south of the country, which used to be much colder, there was no dengue before, but now there is", said Moreira, 59.
