Zombie thought experiments are effective teaching tools:

When you’re the last survivors of the human race, there are some very pertinent questions you must ask:

“How would you protect yourself if infection was spread through the air versus only spread by biting?”

“How well would isolation of infected people work if the incubation period is very long versus very short?”

“Why might you want to thoroughly wash your zombie-killing arrows before using them to kill squirrels, which you will then eat?”

In infectious disease terms, these are referring to the 1) vector of transmission (how does the virus travel), 2) length of incubation (how long does it take before you start passing on the disease and 3) cross-contamination (disease moving from one object to another). But this is much more interesting than talking about “why should you wash your hands before eating dinner,” especially when talking to kids.