Purpose
This page provides an overview of COVID-19 data and trends over time. Other COVID-19 related data visualizations (previously on CDC's COVID Data Tracker) are provided in the resources section at the bottom of this page.
COVID-19 Surveillance Data in the United States
Early Indicators
Test positivity (the percentage of total reported tests that are positive) and the percentage of total emergency department visits due to COVID-19 are key metrics to assess the impact of COVID-19 on communities. For public health professionals, these metrics act as early indicators of potential increases in COVID-19 activity.
Severity Indicators
Hospitalizations and deaths are key metrics for assessing the severity and disease burden of COVID-19, including which groups are at the increased risk of severe COVID-19.