So, I made a little animation trying to explain how herd immunity works.

When enough of the population has been vaccinated, a disease is no longer able to spread effectively, protecting even the unvaccinated. The percentage needed varies with the disease.

#VaccinesSaveLives

Also available on YouTube:

If you like vaccine-based content, I also made a data-driven animation showing the change in the prevalence of vaccine preventable diseases in the USA over the last 100 years: https://twitter.com/RARohde/status/1122819657394786304

The disease spread simulation used in the herd immunity animation is obviously very simplified.

One advantage of that simplicity is that you can easily test outcomes for variations of the parameters.

Here is an example of how herd immunity emerges as vaccination rates climb.

Palette swapped version of the herd immunity video to help red/green colorblindness.

When enough people have been vaccinated, a disease is no longer able to spread effectively, protecting even the unvaccinated. The percentage needed varies with the disease.

#VaccinesSaveLives

I've also added the blue/yellow version to YouTube, so that it is easy for people to share:

Several people have inquired about creating translations of the herd immunity video into other languages. I'm open to recording additional versions if people are willing to provide me the appropriate translated texts.

If you want to help with this, please DM me.

Esta animación explica cómo funciona la "inmunidad colectiva".

Cuando hay suficientes personas vacunadas, una enfermedad infecciosa no puede propagarse y se protege aun a los no vacunados. La cobertura de vacunación necesaria varía según la enfermedad.

#VaccinesSaveLives