With the mosquito-borne illness Zika in the news, it may be hard to remember that just a few years ago, West Nile Virus was the big concern.
Well, it turns out West Nile never had major numbers in metro Atlanta – and now scientists know why.
Each year, only about three people out of 100,000 in the Atlanta area get infected with the virus.
That figure’s low compared to other parts of the country, including Chicago.
For a long time the low infection rate puzzled scientists, since Atlanta’s long, hot mosquito season can last until November.