How viruses spread
- Here is what happens when we run the model. Note that this model does NOT represent the COVID-19 outbreak. The parameter values are chosen for illustrative purposes only, and the time line is arbitrary.
- Note that the number of susceptible individuals (red line) decreases rapidly, while the number of infected indivduals (the green line) increases quickly, peaks, and then starts to decline again as the number of recovered individuals (blue line), who are now immune to infection, increases.