Some US data summaries.
This data is from the CDC's COVID Tracker Data as of September 19, 2021. According to the CDC, it "includes deaths reported by state, local, and territorial health departments. Reporting frequency might vary by jurisdiction. This reflects the most up-to-date information received by CDC based on preliminary reporting." These totals are since January 21, 2020.
Note that the case fatility rate ("CFR") reflects deaths as a percentage of cases. It does not attempt to factor for every person who has had COVID-19 (such as the untested and undiagnosed).
This data is from the CDC's COVID-19 Case Surveillance Public Use Data API, last updated on September 9, 2021, and has data from 29,851,450 cases. The case fatality rate ("CFR") was calculated as the deaths in the age group divided by the number of cases in that age group. The survival rate is the number of cases that did not result in a death, or "1 minus the death rate."
The CDC's COVID-19 Case Surveillance Public Use Data API (last updated on September 9, 2021 reflecting 29,841,450 cases) presents the presence of underlying comorbidity or disease as a field with the possible values of: yes, no, unknown, or missing. 367,359 (~70%) of the case data with a death has this field marked as "Missing."
There are 110,167 cases in the data with a value of "Yes" or "No." Of these, 101,140 (~92%) had an underlying comorbidity or disease. 9,027 (~8%) did not.
This data was downloaded directly from the CDC's COVID Tracker Daily and Total Trends on September 20, 2021. The last date with data from the CDC is September 17, 2021.
This data comes from the CDC's chart Pneumonia, Influenza, and COVID-19 Mortality from the National Center for Health Statistics Mortality Surveillance System. The data was last updated with totals through the week ending September 11, 2021.
This data is published by the National Center for Health Statistics and hosted on the CDC's API as the data set Monthly Provisional Counts of Deaths by Select Causes, 2020-2021. It was lasted updated on September 15, 2021.