Have a look at the Washington Post Simulations and learn about the effects of Social Distancing.
See why isolation of risk groups/elderly does not really work and what happens if you just let it run.

Find 4 simulation models here in the article “Why outbreaks like coronavirus spread exponentially, and how to “flatten the curve”.
Just click e.g on the “Free” button at the Washington Post Site,
to enter directly to the simulations:
https://www.washingtonpost.com/graphics/2020/world/corona-simulator/
