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For more on how averages are calculated, see the F.A.Q. case and death total in order to account for irregularly timed case and death reports at the state level. This average may not match the average when calculated from the U.S. national case and death count averages, the average is the sum of the average number of cases and deaths in all states and territories each day. Certain days with anomalous total case or death reports are excluded from the average or have a portion of their cases and deaths which correspond to data backlogs removed from the average calculation.

Case and death seven-day averages are adjusted to reduce the impact of anomalous reporting. Cases and deaths data are assigned to dates based on when figures are publicly reported. Department of Health and Human Services and are subject to historical revisions. Hospitalizations and test positivity are reported based on dates assigned by the U.S. viral test specimens tested by laboratories and state health departments and reported to the federal government by the 50 states, Washington D.C. Hospitalization numbers early in the pandemic are undercounts due to incomplete reporting by hospitals to the federal government. Dips and spikes could be due to inconsistent reporting by hospitals. Figures for Covid patients in hospitals and I.C.U.s are the most recent number of patients with Covid-19 who are hospitalized or in an intensive care unit on that day. The seven-day average is the average of the most recent seven days of data. Department of Health and Human Services (test positivity, hospitalizations, I.C.U. About this data Sources: State and local health agencies (cases, deaths) U.S.