That information could have made a difference, but we didn’t have access to it, and many of the mistakes we made early last year derived from that obliviousness. The United States made plenty of missteps, including marked failures of leadership, even after these facts became known. But early data-sharing and other critical insights could have alerted our public health experts sooner to the threat the coronavirus posed and helped us mount a better response. At the outset, weeks matter. Critical time was lost because of poor situational awareness.