Louis Pasteur is remembered for his remarkable breakthroughs in the causes and preventions of diseases. This clip shows his successful vaccination of animals and his interest in replicating it for humans.

This clip illustrates how yeast makes bread rise in a simple and fun way.

Lucy and Ethel bake bread but put too much yeast. This clip can be used as an introduction to teaching about microorganisms such as yeast. It illustrates just how fast yeast grows and the role it plays in baking.

In an attempt to be scary, Double D dresses up as the bubonic plague for Halloween. Despite his hints, which include facts about the plague, Ed and Eddy are unable to figure out what his costume depicts.

The CDC attempts to find a solution for a worldwide epidemic. However, it is easier said than done because the vaccine must go through an extensive process before it can be released to the public.