August 21, 2022 Analysis of EU national data
This is an update to the analysis approach first used for the July 2022 analyses of European data. See the descriptions from those pages for background about the analysis. The method uses hospital admission data alone to estimate population-level immunity by the shape of the BA.2 wave.
Model fits to data: possible signs for waning of immunity
Hospital admission data from August 14 followed the projection from the analysis of August 7 data, except for Norway which had greater than expected admissions. August 21 data from all six countries were all above expectations, and to interpret these data, waning of immunity was added, with typical time scales of about 8 months. For comparison, the models from August 21 (solid lines) and August 14 (dashed lines) are compared. More data is required to establish evidence for waning of population-level immunity.
Belgium
France
Ireland
Norway
Switzerland
United Kingdom
