FROM JOHN HOPKINS CENTER FOR SYSTEMS SCIENCE VIA CNN HEALTH
About the data
CoronaVirus case and deaths data since January 2020 reported here comes from Johns Hopkins University’s Center for Systems Science and Engineering, which collects data from several sources, including state, county and local health departments.
More detailed information about JHU’s sources is available on its GitHub repository.
To show the general trends of newly reported cases and deaths, CNN has calculated seven-day moving averages. These figures are calculated by averaging the number of newly reported cases and deaths from the previous seven days.
Displaying averages helps to smooth out data irregularities caused by, for example, changes in reporting criteria or reporting delays caused by weekends and holidays. States are classified as “mostly steady” when their average numbers of new cases is between 10% less and 10% more than its value 14 days earlier; “rising” when their averages have increased by more than 10%; and “falling” when their averages have decreased by more than 10%
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