Outbreak at Mother Base

- Upon completing Mission 25, a disease breaks out among your staff on Mother Base, decimating your men and women. You'll want to take a good look at your staff via your iDroid and place any suspicious or potentially infected members in quarantine.

- Remember the creepy earplugs inside the bodies right before the Man on Fire boss fight? This is actually a hint on what to look for.

- You should switch from the manual staff display to a more detailed one, where you can see which specific stats and languages a staff member has/speaks.

- Quarantin[Subsistence] all members who speak the Kigongo language. This is how the disease spreads somehow. It will probably take several minutes at least to quarantine all that staff, but it's worth containing.

- Consider doing only main missions until you've found out everything there is to know (main story-wise) about the disease and have found a cure.