Tests reveal Zika circulating in Africa for more than 20 years
Zika virus has been silently circulating in West Africa for more than two decades, according to a study of 387 blood samples collected from 1992 to 2016, researchers from Harvard University, Nigeria, and Senegal reported in the Journal of Infectious Diseases.
The virus was first identified in 1947 but wasn't linked with known epidemics until 2007 and hadn't been linked to neurologic disease before 2015.