I'm fairly certain why Zika was associated with a sudden increase and decrease in birth defects in 2015. It was a terrible decision by the Brazilian Health Department and they've tried to erase any sign of their involvement.
I’ve spoken a lot about the Zika story that happened in Brazil a year or so ago and the mysterious birth defects that seemed to be caused by it. In my new book Crooked:Man-Made Disease Explained, I go through exactly what I think caused the huge spike in children with birth defects and I wanted to share this part of the book with you before Zika fades into obscurity. The reason these children’s lives were ruined was entirely preventable, and I think we should ask what caused it so that we might avoid doing it again.