Changes in version 0.0.5 Version to be uploaded to CRAN, accompanies the publication by Dudasova, Valenta & Sachs, 2024, NPJ Vaccines. Implementation of efficacy estimation using time-to-event models (fitted with coxph() function). Changes in version 0.0.4 Changes in version 0.0.3 (2024-02-28) Version to be uploaded to CRAN, accompanies the publication by Dudasova, Valenta & Sachs, 2024, BMC Med Res Methodol. Changes in version 0.0.2 Version with logistic regression. Changes in version 0.0.1 Initial version of the package, proprietary.