And apparently the Brazilian government confirmed the link to microcephaly in 2015:
Last week, Brazil’s health ministry confirmed the link between the virus and the microcephaly cases. It is calling for a national effort to contain the mosquito, Aedes aegypti, that spreads Zika, as well as dengue fever and chikungunya. […]
At an unprecedented rate, the Zika Virus is infecting and affecting the global community. Originally discovered by scientists researching yellow fever in Africa during 1947, the Zika Virus has unfortunately grown in its rampant effects and has subsequently been attacking populations since its widespread outbreak in 2007.