Epidemiological Tools for Outbreak Investigation and Analysis R package OutbreakR version 0.1.0 Provides tools for epidemiological analysis of disease outbreaks, including measures of disease frequency, association, impact, transmission, and vaccine effectiveness. Functions support prevalence, incidence, attack rates, mortality, case fatality, risk ratios, odds ratios, rate ratios, attributable measures, reproduction numbers, herd immunity thresholds, contingency tables, grouped analyses, and outbreak line-list validation. Software Depends: R (>= 4.1.0) Suggests: covr, spelling, testthat (>= 3.0.0) Vinodhkumar Obli Rajendran <vinodhkumar.rajendran@gmail.com> Comprehensive R Archive Network (CRAN) Vinodhkumar Obli Rajendran [aut, cre], Keerthi Aaradhana [aut] GPL (>= 3) 2026-08-04 application/tgz https://CRAN.R-project.org/package=OutbreakR doi:10.32614/CRAN.package.OutbreakR en-US