Herd-Immunity Threshold
Interactive lab: The formula 1 − 1/R₀ is elegant. And incomplete.
What is this?
A visual, interactive experiment about Herd-Immunity Threshold. Its main parameters update live and the simulation runs entirely in the browser.
How it works
Under homogeneous mixing Rₑ = R₀(1−p). Contact heterogeneity gives high-degree people disproportionate weight and shifts the threshold.