This is a linkpost for https://meltingasphalt.com/interactive/outbreak/
Interesting. Hopefully someone here has some experience but seems to show interesting results as one plays with the parameters.
One thing I notices was it was not just the transmission rate the influenced an major outbreak of just some pockets of infections.
The other interesting observation was the fundamental randomness of the outcomes. In some cases I would see a small isolated pocket. Run it again, it might cover about 40 percent of the population.
Kevin Simler released another blogpost, this time on disease spread modeling. Excerpt: