Replication (IMAGE) Morgridge Institute for Research Caption This graphic outlines a previously unobserved step in the viral genome replication process employed by positive-strand RNA viruses, which include Zika, dengue, chikungunya, polio and hepatitis C. Credit Morgridge Institute for Research Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.