Fig. 2

The estimated size of the effective reproduction number (A, D, G, L), cumulative hospital admissions (B, E, H, K) and cumulative deaths (C, F, I, L) with and without reported risk mitigation measures. A–C With a 20% reduction in severity associated with Omicron relative to Delta. D–F With a 50% reduction in severity associated with Omicron relative to Delta. G–I With a 20% reduction in severity associated with Omicron relative to Delta and assuming that vaccine effectiveness against severe disease is not reduced with Omicron infection. J–L With a 50% reduction in severity associated with Omicron relative to Delta and assuming that vaccine effectiveness against severe disease is marginally reduced with Omicron infection. Vaccine distribution as of 26 November 2021