Herd Immunity Demonstration

A population of individuals completely susceptible (red) to infection.

Click Play to watch them moving around their environment at random. The slider controls speed.

Use the other controls to pause/resume, step and reset the scenario.

This is 1 of 8 scenarios. It just introduces movement (it's boring!) - infection comes next.

Click the NEXT link (above) on any scenario at any time to see the next one and BACK to see the previous one.

Random elements to initialisation mean that no scenario is ever set up the same twice, even when replaying (Reset, then Play).

This is a Susceptible Infected Recovered (SIR) model with people always being in one of those three states.