When a survivor falls ill or is seriously injured, there is a chance that they may become infected and may not heal from that injection. This will result in the survivor turning into a zombie, who will then attack other members of your party at your base.
An ill survivor may be highlighted with the mission "Mercy Killing", which will give you three options;
- Kill the survivor
- Evict the survivor from your base
- Defer the decision until later
If you defer the decision, what are the chances of the survivor becoming infected and turning into a zombie? Is this related to the amount of medicine you have on base or any other factors? Is it worth always killing off a survivor in case they turn?