Note the media typically quotes the CFR (Case Fatality Rate) but this is based upon diagnosed cases, which ignores the vast majority of cases since overall the wholw course of the pandemic most have not been confirmed, and it is also quite imprecise since deaths that are listed as due to Covid-19 include many that are presumed to be caused by that virus, but which patients are not diagnosed as having Covid. As for the CFR for the US, with 343,182 Covid-assigned deaths out of 19,781,624 confirmed positive cases then the CFR presently is 1.73.
As for what I find for an worldwide IFR, a October 5, 2020 study in the European Journal of Epidemiology volume 35, states,
The estimated age-specific IFR is very low for children and younger adults (e.g., 0.002% at age 10 and 0.01% at age 25) but increases progressively to 0.4% at age 55, 1.4% at age 65, 4.6% at age 75, and 15% at age 85.
It also states,
assessments of the case fatality rate (CFR), the ratio of deaths to reported cases, are fraught with pitfalls in gauging the severity of COVID-19.[2]
As for the US, using my own research, the CDC (Dec. 11) provides a figure of 91 Million Estimated Total Infections (Coronavirus Disease 2019 (COVID-19) at which time there were about 300,000 Covid-assigned deaths, which it would figure to be a IFR or 0.33 (figures are rounded).
As for the crude mortality rate (CMR) - that of Covid deaths as a percentage of the US population - with 340,000 Covid-assigned deaths[3] as of 12–27 AM, and 32 million (figures are rounded) souls in the US[4], then that figures to be 0.0010625 CMR.
Footnotes
Edit “32 million souls in the US” was meant to be 332 million.