Brazil asks whether Zika acts alone to cause birth defects

[jfh]

Zika was discovered in 1947 and hadn’t been implicated in birth defects until now; and current strains of the virus don’t show any significant mutations that might have increased its virulence.

I can't reproduce the article, so ... https://www.nature.com/news/brazil-asks-whether-zika-acts-alone-to-cause-birth-defects-1.20309