The Times is excluding these anomalies from seven-day averages when possible. Governments often revise data or report a single-day large increase in cases or deaths from unspecified days without historical revisions, which can cause an irregular pattern in the daily reported figures. Probable cases and deaths count individuals who meet criteria for other types of testing, symptoms and exposure, as developed by national and local governments. The tallies on this page include probable and confirmed cases and deaths in some counties.Ĭonfirmed cases and deaths, which are widely considered to be an undercount of the true toll, are counts of individuals whose coronavirus infections were confirmed by a molecular laboratory test. Counts for Alameda County include cases and deaths from Berkeley and the Grand Princess cruise ship.Some counties temporarily stopped reporting new data during this time. New cases reported during the first two weeks of August were artificially low while the state resolved a technical issue with its data system.Los Angeles County added many deaths from December and January after reviewing vital records.Ĭalifornia announced a backlog of about 12,000 cases from previous days.Ĭalifornia added a number of cases from a testing backlog. Los Angeles County added many older cases and deaths.Ĭalifornia removed more than 1,000 duplicate cases in San Diego County, resulting in a one-day decrease in cases.Ĭalifornia made data adjustments resulting in a one-day increase in deaths. Santa Clara County removed many deaths from causes unrelated to Covid-19.Ĭalifornia began reporting probable cases based on antigen testing.Ĭalifornia removed many duplicate and incorrectly categorized cases.Ĭalifornia added many San Mateo County deaths from previous months.Īlameda County removed many deaths from causes unrelated to Covid-19. The Times began including probable cases based on antigen testing in many California counties, resulting in one-time increases. Los Angeles added about many older cases representing people who were infected twice.Ĭalifornia removed around 400 deaths in Santa Clara County after verifying records. Yuba County stopped regularly reporting cumulative cases.Ĭalifornia added a backlog of about 4,400 cases from one lab.Ĭalifornia did not announce new cases and deaths for the Thanksgiving holiday.Ĭalifornia was unable to release new data because of issues related to the storm on Oct. The Times began including death certificate data reconciled by the C.D.C., resulting in a one-day increase in total deaths.
The federal data updates approximately once a month and appears as a spike in deaths on the day it updates. data based on death certificates for locations that do not report deaths regularly or comprehensively. More about reporting anomalies or changes The Times has identified reporting anomalies or methodology changes in the data.
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