Prior dengue infection protects against Zika

The higher a person's immunity to dengue virus, the lower their risk of Zika infection, an international team of scientists report today. The study -- which followed nearly 1,500 people living in a poor neighborhood at the heart of the 2015 Zika outbreak in Brazil -- also provides evidence for why Brazil's Zika epidemic has largely petered out.

https://www.sciencedaily.com/releases/2019/02/190207142213.htm