COVID-19 Case Rates by Vaccination Status

This dashboard shows the 7-day daily average COVID-19 case rate by day for Santa Clara County overall, for unvaccinated residents ages 12 and up, for residents ages 0-11, and for fully vaccinated residents. The COVID-19 case rate for the county overall is calculated as the total number of cases on a given day per 100,000 County residents. The COVID-19 case rate for unvaccinated residents is calculated as the total number of cases on a given day per 100,000 unvaccinated residents on that day. The COVID-19 case rate for fully vaccinated residents is calculated as the total number of cases on a given day per 100,000 fully vaccinated residents on that day. For this dashboard, residents are considered fully vaccinated two weeks after the final dose of the vaccine, and residents are considered unvaccinated if they have not received any doses of a COVID-19 vaccine. The case rate is calculated using the changing population of each group as unvaccinated people become vaccinated. People who are partially vaccinated, meaning they only received one dose of a two-dose vaccine or who are not yet 14 days after their final dose, are not included in either category. Case rates are used in the dashboard instead of the number of cases because case rates allow for a better comparison of the burden of COVID-19 between different sized populations.

All of the County’s COVID-19 dashboards have transitioned to using the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates population estimates. These population estimates more accurately reflect our county population and demographics based on the preliminary 2020 census data. Previously, our dashboards had been using the State Department of Finance’s County Population Projections by Race/Ethnicity and Age.

This dashboard is updated Wednesdays and Fridays and will not be updated on holidays.

Sources: California Reportable Disease Information Exchange; California Department of Public Health, California Immunization Registry; the U.S. Census Bureau, 2015-2019 American Community Survey 5-Year Estimates.

Data Notes: Cases are reported by the date that the specimens were collected for testing. Cases that do not have a valid specimen collection date will not show up in the graph. This data is presented with a 7-day lag to account for the time it takes for tests to be run in the lab and then reported to the Public Health Department. As part of ongoing data quality efforts, data are updated as the County receives information that is more complete or accurate. Therefore, case rates may change as cases are added to or removed from total counts through this process.

 

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