How will you measure infection fatality after the pandemic is over? You will still need to know the number of infected (including the asymptomatic) before you c

How will you measure infection fatality after the pandemic is over? You will still need to know the number of infected (including the asymptomatic) before you can arrive at a meaningful number. Or do you mean that infection fatality can be calculated once you assume that 100% of the population has been exposed to the virus? IFR would still be based on assumptions, I think.