In many previous articles, I've established there is no convincing evidence the Zika virus causes the birth defect called microcephaly. (Zika archive here)

Basically, Brazilian researchers, in the heart of the purported "microcephaly epidemic," decided to stop their own investigation and simply assert Zika was the culprit. At that point, they claimed that, out of 854 cases of microcephaly, only 97 showed "some relationship" to Zika.

You need to understand that these figures actually show evidence AGAINST Zika. When researchers are trying to find the cause of a condition, they should be able to establish, as a first step, that the cause is present in all cases (or certainly an overwhelming percentage).

This never happened. The correlation between the presence of Zika and microcephaly was very, very weak.

As a second vital step, researchers should be able to show that the causative virus is, in every case, present in large amounts in the body. Otherwise, there is not enough of it to create harm. MERE PRESENCE OF THE VIRUS IS NOT ENOUGH. With Zika, proof it was present in microcephaly-babies in large amounts has never been shown.