David Crowe and I have reviewed the original study for Zika virus in 1947, Dick et al.
The study concerns the blood plasma from one healthy Rhesus monkey (temperature 40C, upper range of normal temperature).
The study concerns the blood of one monkey, with no controls. !
The "virus" from the monkey's blood was clearly never isolated, though the authors claim to have isolated a virus. More likely they were developing an allergen or hormonal poison via a passaging process called "adaptation to the mouse model".
The "adaptation" required many passages of brain matter from sick and dead mice injected into the brains of healthy mice.
The injection of monkey blood plasma could only produce an "infection" when injected into the BRAIN of the mouse. Injection into the BODY cavity failed to produce any "infection".
This allergen matter is called "Strain 766" and sold by ATCC for about $500, having been deposited to ATCC in 1953 by the Rockefeller Institute.
Dick et al had no idea what Strain 766 consisted of, though they insisted it was a virus. They conducted no environmental nor toxicological investigations.
---from Kayran Nayeri---
Working with lab-grown human stem cells, a team of researchers suspect they have discovered how the Zika virus probably causes microcephaly in fetuses. The virus selectively infects cells that form the brain's cortex, or outer layer, making them more likely to die and less likely to divide normally and make new brain cells.