plain_o_llama said:
A reminder for those not following this closely.... (not Squadron7)
The IFR is based on the number of actual infections across the whole population and is exceedingly
difficult to determine. It is not the same as the CFR which is based on the cases of infection that have been identified. More confusing, differences between countries and states in testing procedures and availability skew the CFR in ways that are difficult to reconcile for comparison purposes.
Conflating these two ideas is rather unhelpful for developing policy.
Good point. Those are materially different metrics.
This is how I have been thinking about it
CFR = Pr (Death | Diagnosed)
IFR = Pr (Death | Infected)
Diagnosed is a subset of infected.
Is that fair to say diagnosed == identified?