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How do viruses spread through a population? From ebola to bird flu, humans are surrounded by deadly viruses.

In this lesson, students use exponential growth and logarithms to model how a virus spreads through a population and evaluate how various factors influence the speed and scope of an outbreak.

- The world is full of viruses that are biologically programmed to spread. “Successful” viruses spread easily but kill very slowly so that they have more time in the infected host to contaminate others.
- Humans can keep harmful viruses in check by: creating immunity in people without the virus or restricting the contact those with the virus have with others.

- Write an equation to represent exponential growth; describe the effect of each parameter on the overall model
- Solve exponential equations using a variety of methods, including logs