There are different kinds of Meningitis, but it is an illness that affects the what?
Options:
- brain
- nursing home
- nail
- hospital
- doctor's office
Please answer and provide answer explanation.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Meningitis is a serious disease in which there is swelling of the three membranes that line the skull and vertebral canal and enclose the brain and spinal cord. Meningitis is an illness that affects the brain as there is a swelling in meninges a part or portion of brain. The final answer: brain.