How Herd Immunity Works — And What Stands In Its Way




What will it take to finally halt the spread of the coronavirus in the U.S.? To answer that question we’ve created a simulation of a mock disease we’re calling SIMVID-19.

When you click “Run Simulation” above, you are witnessing how a disease can spread through a population and how increased levels of vaccination can stop it in its tracks.

We’re chosen to simulate a fake disease since there are too many unknowns to simulate the course of COVID-19. There are common features in how any infection spreads. When enough people are immune — through vaccination or natural immunity — a population achieves herd immunity. The disease stops spreading efficiently and starts to fade away.

Author(s): Richard Harris, Thomas Wilburn

Publication Date: 18 February 2021

Publication Site: NPR