I think that what they are saying is they looked at a study that took the total number of cases (based on seroprevalence) and recorded deaths to calculate the I

I think that what they are saying is they looked at a study that took the total number of cases (based on seroprevalence) and recorded deaths to calculate the IFR, and then they used that IFR value and new data of recorded deaths on more recent dates to predict the total number of cases today. Is that an accurate description?