Yesterday I posted a brief note critiquing Laura Ingraham’s Covid Survival Rate chart. Turns out there’s a better explanation of Ingraham’s chart numbers than the one I came up with.
Based on a little number crunching I assumed Ingraham’s survival rate to be the complement of the case mortality rate, which I calculated from CDC data. I needn’t have relied on the CMR calculation, however. Elsewhere on the CDC web site, the government provides estimates of Covid-19’s infection fatality rate for the same age groups as Ingraham’s chart. Ingraham’s survival rate numbers are indeed complements of the IFR for each age group (i.e., an IFR of 5% would imply a survival rate of 95%).
Other parts of my post remain valid. In particular, had Ingraham’s chart clearly defined the term survival rate I could have avoided error and confusion by searching for the correct CDC data set.
Moreover, Ingraham’s Covid Survival Rate chart is reasonable, accurate and truthful as a means of visualizing the CDC’s infection fatality rate estimates. It is certainly useful to know that the probability of surviving a Covid-19 infection is almost 99% (average) across all age groups.