The ECDC updates are based on available data reported through the European Surveillance System (TESSy) by the national public health authorities of EU/EEA countries.
This first update of the original guide was prompted by the evolution of the Zika virus epidemic, a new classification system for countries/areas, and recent scientific developments.
This document includes key elements to be considered in the risk-based decision-making process of mitigating the threats to the safety of substances of human origin posed by Zika virus.