"In epidemiology, a case fatality rate (CFR) — sometimes called case fatality risk — is the proportion of deaths from a certain disease compared to the total number of people diagnosed with the disease for a certain period of time."

As compared to the IFR: "The term infection fatality rate (IFR) also applies to infectious disease outbreaks, and represents the proportion of deaths among all the infected individuals. It is closely related to the CFR, but attempts to additionally account for all asymptomatic and undiagnosed infections." [1]

One's the risk that given you show up at a hospital, you die. The other is the risk given that you get infected, you die.

[1] https://en.wikipedia.org/wiki/Case_fatality_rate

Case Fatality Rate; the rate of people who are confirmed to have COVID-19, and die. The problem is that the people most likely to be tested are those in the worst condition.