It's probably a mix of a) society becoming more stupid b) the media not being able to hype something that doesn't kill at rates similar to bird flu or ebola c)

It's probably a mix of a) society becoming more stupid b) the media not being able to hype something that doesn't kill at rates similar to bird flu or ebola c) the media not having as close a connection with the victims as media darling diseases like HIV. This is something that can cause severe retardation in children at somewhere on the order of 5-10x more than Downs Syndrome where mothers are infected- and that's comparing to rates for Western countries with women having children at the extreme outer edge of the healthy childbearing age. Bird flu is bad, but when it kills, it's a rapid death, and the places where it has occurred don't have particular problems with population replcement. Zika, on the other hand, can mean that the mother's life and a fair amount of government and NGO money is going to be tied up caring for the affected baby. Not as bad an impact as HIV has had in the third world (outside of Cuba), but it still needs stopping before the problem grows.