A tiny bug called rhinovirus causes most colds.
It makes some people very sniffly and sad.
But other people don't even feel the tiny bug.
Our bodies fight the bug in different ways.
1 day, 4 hours ago

A tiny bug called rhinovirus causes most colds.
It makes some people very sniffly and sad.
But other people don't even feel the tiny bug.
Our bodies fight the bug in different ways.
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