Fig. 2: Change in vaccine effectiveness from Delta to Omicron.
From: Vaccine effectiveness against emerging COVID-19 variants using digital health data
a Distribution of within-CLI change (VEOmicron−VEDelta) across all CLI definitions. b Distributions of VEOmicron−VEDelta among CLI definitions within each anchor symptom. Each box-plot contains estimates for an anchor symptom paired with the 11 other symptoms. Box-plots are ordered according to the magnitude of the median change, with the median across all VE indicated by the gray dashed line. Each box represents the interquartile range (IQR) of estimates, with the horizontal line inside the box indicating the median. The whiskers extend to the largest/smallest values up to 1.5 times the IQR. Outlier values are represented as points. Each VE estimate from the Delta and Omicron periods is derived from 64,283 and 79,697 survey responses, respectively.
