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JHU has stopped collecting data as of

03 / 10 / 2023

After three years of around-the-clock tracking of COVID-19 data from...

By Region

Data Notes

General Notes

September 14, 2021

  • Reduced counts in U.S. cases and deaths are the result of states and territories not reporting the information for some or all of the weekend. Those states and territories are: Alaska, Colorado, Connecticut, District of Columbia, Florida, Georgia, Guam, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Massachusetts, Michigan, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Hampshire, New Mexico, North Carolina, Northern Mariana Islands, Oklahoma, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, U.S. Virgin Islands, Virginia, Washington, West Virginia, Wisconsin, and Wyoming. Typically, these states" Monday updates include the weekend totals.

Region Notes

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All Regions

October 5, 2022


September 21, 2022


  • On September 15, 2022, California switched to providing data once per week: Data will update on Thursdays. The Coronavirus Resource Center's reporting for California's cases and deaths takes a composite approach where some locations are sourced from county health departments. These counties may update on a different schedule. While some data will likely be published most days, the bulk of the data will be released on Thursdays with the state update.

April 19, 2022


  • On April 5, 2022, California shifted to Tuesday/Friday reporting.

June 11, 2021


  • Alameda County on June 11 lowered its COVID-19 death toll by 411 fatalities to 1,223 after local health officials changed how they count pandemic deaths to match California’s methodology. The state’s tally only includes fatalities in which COVID-19 has been declared the official cause of death. The county’s total included any deaths in which the deceased had tested positive for COVID-19.