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ELI5: Why do some scars (like grazes, eczema scars, etc) heal leaving little or no trace, but others (chicken pox scars) don't disappear even after tens of years?
ELI5: Why do some scars (like grazes, eczema scars, etc) heal leaving little or no trace, but others (chicken pox scars) don't disappear even after tens of years? * /r/explainlikeimfive
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