The human vagina is a lively place, full of beneficial bacteria that discourage nasty microbes from invading. Now, new research finds this ecosystem is even more mysterious than previously realized.
Not only do women vary widely in what sorts of microbes call the vagina home, the study finds, but the ecosystem of the vagina can also change rapidly — to no ill effect. That's important, because while some vaginal infections are associated with changes in the vagina's native flora, it's now clear that not every change is a sign of disease.
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