|Description||Virus able to enter brain cells and modify DNA, improving existing neural pathways. Increases intelligence in humans|
|Cure effect||15% faster to develop|
|Next symptom||Neuro-enhancement 2|
Neuro-enhancement 1 is a tier 1 symptom exclusive to the Simian Flu DLC. It allows the virus to enter the brain and modify DNA, making humans smarter. This symptom also increases research speed.