Sydney smallpox epidemic - a podcast by ABC Radio

We're now quite familiar with terms like 'herd immunity' and 'epidemic', and that when separate groups of people—with separate germs—meet for the very first time, things can turn out badly. If you have never been exposed to a specific germ you won't be primed for protection against it.

Further episodes of Great Moments In Science

Further podcasts by ABC Radio

Website of ABC Radio