California coronavirus cases: Tracking the outbreak

This page was created by Swetha Kannan, Casey Miller, Sean Greene, Lorena Iñiguez Elebee, Rong-Gong Lin II, Ryan Murphy, Melody Gutierrez, Priya Krishnakumar, Sandhya Kambhampati, Maloy Moore, Jennifer Lu, Aida Ylanan, Vanessa Martínez, Ryan Menezes, Thomas Suh Lauder, Andrea Roberson, Ben Poston, Nicole Santa Cruz, Iris Lee, Rahul Mukherjee, Jaclyn Cosgrove, Anthony Pesce, Paul Duginski, Phi Do, Alejandro Maciel and Matt Stiles.

State and county totals come from an ongoing Times survey of California’s 58 county health agencies as well as the three run by cities. Those figures are ahead of the totals periodically released by the state’s Department of Public Health. State officials acknowledge that their tallies lag behind the updates posted by local agencies throughout the day and do not dispute The Times’ method. Numbers are gathered and posted twice per day, once at 9 a.m. Pacific and again at 5 p.m. Pacific.

Data on hospitalizations, tests, demographics and reopening plans come from the state health department.

The number of people who have recovered from a coronavirus infection is an estimate, created by a model described in our FAQ.

Nursing home totals include skilled-nursing facilities tracked by the state public health department, as well as assisted-living facilities monitored by the California Department of Social Services.

Data from other states, Washington, D.C. and Puerto Rico are collected by researchers at the Johns Hopkins University Center for Systems Science and Engineering.

Counties are organized into regions using the groupings developed by the state health department.

The Times database is available to the public on Github, a popular website for hosting data and computer code. The files will be updated daily at github.com/datadesk/california-coronavirus-data.

The data collection effort is done in partnership with journalists at the San Francisco Chronicle, the San Diego Union-Tribune, KQED, KPCC, CapRadio, Calmatters and Stanford’s Big Local News.

Learn more about The Times count by reading this list of frequently asked questions or by reading this interview with members of our team.

If you see information here that you believe is incorrect or out of date, please contact Data and Graphics Editor Ben Welsh at ben.welsh@latimes.com.

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