Epidemiology is the study of how diseases distribute and propagate through human populations. At its core lies the basic reproduction number R₀ — the average number of secondary infections produced by a single infected individual in a fully susceptible population. When R₀ exceeds 1, an epidemic grows exponentially; below 1, it fades away. Understanding these dynamics is essential for designing effective public health interventions.
These simulations let you experiment with the levers of epidemic control. Calculate herd immunity thresholds for different diseases, trace contacts through social networks, design vaccine trials with proper statistical power, manipulate R₀ through interventions, and observe how different strategies flatten the epidemic curve to protect healthcare capacity.