The COVID-19 pandemic has profoundly affected the lives of tens of millions of people worldwide, causing deaths and disrupting healthcare systems, societies, and economies. Accurate, timely data are critical to understanding the spread of the virus, responding to it, and guiding future research and policy.
Article updates are based on estimates of the time-varying reproductive number, Rt, from incident emergency department (ED) visits. A value above 1 indicates that the outbreak is growing.
Health benefits resulting from a pandemic include:
Values may vary by individual, but can be generalized to groups and communities.
This list is based on the most reliable available data.