Mystery #3Tier 3microbes / immunity
How does a vaccine protect you without making you ill?
A vaccine protects you from an illness, yet it doesn't give you that illness to do it. That seems almost like a trick: how can your body learn to beat a germ it has never actually fought?
Your guess
What's your hunch about how a vaccine can get your body ready for a germ without making you ill?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.