Social distancing reduces the number of infections - but it does not change the course disease once a patient is infected. So out of the infected (for IFR or ou

Social distancing reduces the number of infections - but it does not change the course disease once a patient is infected. So out of the infected (for IFR or out of the reported case for CFR) there should be the same fraction of fatalities with and without social distancing. Fatality rate is that fraction.