Mystery #3Tier 3outbreak chains
How can a single sick person end up causing thousands of others to fall ill?
It sounds impossible: one person wakes up sniffly, and weeks later thousands are ill. Nobody sneezed on a thousand people. So how on earth can a single sick person set off an outbreak that reaches so many?
Your guess
How could just one sick person end up making thousands of others 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.
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