Apps
Interactive Apps
Here you’ll find links to the suite of interactive Shiny apps:
Incidence Rate and Risk Simulator
Interactive simulator showing how incidence rate and incidence risk are related, including the effects of entries and losses from the population.
Predictive Value Calculator
Calculates positive and negative predictive values of diagnostic tests across different prevalence levels, illustrating how predictive values depend on context.
Herd Sensitivity Calculator
Estimates the probability of detecting infection in a herd given the test sensitivity, within-herd prevalence, and number of animals sampled.
Herd Detection Calculator
Quantifies the likelihood of detecting at least one positive herd in a population under different surveillance sampling designs.
Herd Prevalence Estimator
Estimates herd-level prevalence from survey data, using exact or approximate confidence intervals depending on population and sample size, with visualizations of observed and projected precision.