FluNet - Canada and United States (IMAGE) Concordia University Caption Figure 1. Weekly time-series presentation of COVID-19 cases (for 2020; red line) and influenza cases (for the seasons 2016-2020; blue lines) across the northern hemisphere [Case of Canada (A) and the United States (B)]. *The week in which the country implemented policy restrictions is noted with a black vertical line. Credit Graphs originally published in Frontiers in Public Health Usage Restrictions Credit study authors and publication. 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.