How long does the viral meningitis virus stay in your body? if i feel completely fine after 12 days, does it mean i am cured?

Yes, most likely: Viral meningitis usually lasts from 7-10 days. If she is without symptoms and able to resume her activities without pain or disability, i would say she is cured.

Cured: Viral meningitis can last from just a couple days to a couple weeks. No drugs can cure it, your body has to get rid of it. Once you no longer have fever or feel any symptoms, your body has done its job and gotten rid of the virus.