Due to the high rate of mutation of viuses, hundreds of subcatagories of flu types are in the air. New vaccines are created every year to combat the most common strains for the new season. Melvin Sanicas explains flu vaccines and why they people need a new flu shot every year.

The StoryBots team debriefs their boss, Hap, on the information that they have found out in relation to Malachi's question of "How do people catch a cold?".

This clip discusses how the flu is actually a set of viruses and how it infects and causes sickness. It also explains how the flu vaccine works.

Hank explains innate immune systems and how the signs that we may associate with sickness are actually be symptoms of your immune system working.

Sam wakes up and is greeted by Lola and Anna. Anna explains that Lola has a cold, and they teach him the word for "cold" in Spanish.