[PA Engineer]

It was a very "acute" epidemic from early 2013 to 2014 and disappeared.

From NPR (some problems with their reporting but fairly accurate):

Zika In French Polynesia: It Struck Hard In 2013, Then Disappeared

Interesting read and covers other virus detections previous to French Polynesia.

[palmer]

From your link: The possible link between the Zika virus and birth defects only emerged last year after health officials in Brazil reported hundreds of thousands of Zika cases. Those reports out of Brazil prompted researchers in French Polynesia to do a retrospective investigation to search for congenital abnormalities that may have been caused by the virus. Van-Mai says they found a disturbingly high number of birth defects.

The "disturbingly high" number in the article is 15 and they don't give the total number of births and miscarriages. The numbers of birth defects in Brazil were up to 10 times the previous numbers but the previous numbers were underreported by 4-5 times. Realistically there is only an anecdotal link at this point but the media is treating it like a sure thing.