But with very few cases of Zika reported in Rio in recent weeks, the mosquitoes themselves, if they appear, have few sources of even picking it up. Aedes aegypti, the mosquito primarily responsible for spreading Zika, transmits it by biting an infected person and then moving on to another. Rio de Janeiro has not turned out to be the Zika hothouse some athletes and visitors feared. Despite some hot days, swings back to cooler temperatures in Brazil's winter mean that the population of the mosquito responsible for spreading the virus has dwindled. And those who get the virus normally do so within days of being bitten by a mosquito infected with Zika.

Source: dna August 09, 2016 03:56 UTC