Is Yellow Fever Knocking At Our Door?
An outbreak in Brazil isn't slowing down as predicted. Dr. Anthony Fauci calls it "a potential threat" to the U.S.
Scientists love patterns.
It's what makes science possible — and powerful — especially when it comes to infectious diseases.
Over the past 30 years, scientists have noticed a distinctive pattern of mosquito-borne diseases in the Western Hemisphere: Three viruses have cropped up, caused small outbreaks and then one day — poof! — they hit a city and spread like gangbusters.
All three viruses are carried by the same mosquito, called All three have
