National Institutes of Health: Dengue immunity may be protective against symptomatic Zika, study finds
“Children with a history of prior dengue virus infection had a significantly lower risk of being symptomatic when infected by Zika virus, according to a study in Nicaragua of more than 3,000 children aged two to 14 years. … [T]he new findings, published in PLOS Medicine, indicate that prior dengue immunity in children may in fact be protective against symptomatic Zika disease…” (1/22).