Mystery #4Tier 3microbes / medicine
Why, with all our science, is there still no pill that cures the common cold?
We can transplant hearts, land robots on Mars, and wipe out diseases that once terrified whole cities. Yet the humble common cold still beats us every winter, with no pill that simply makes it go away. Why, with all our cleverness, is there still no cure for a cold?

Your guess
What's your hunch about why there's no simple pill that just cures a cold?
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