Omicron Map (IMAGE) University of Cincinnati Caption Researchers used county health data to compare the delta and omicron variants of COVID-19. Researchers found that the highly infectious omicron variant spread more quickly in urban, populated areas but caused more fatalities in rural America. Credit UC Digital Epidemiology Lab Usage Restrictions None License Original 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.