How would you handle wound infection?

I’m considering an “ultra-realistic” late medieval campaign. As we know, many or most duels ended in both parties dying, the winner just survived their injuries a bit longer. Even in modern times people say you know who won a knife fight because they die in the hospital instead of the street.

I’m thinking if two wounds are subjected in one hit, you would roll on the injury table. If one is, you would not.

If no healing roll is done (Skill not soak, after battle) then the player rolls vigor to resist infection. Maybe they get one freebie?

For the infection itself, would you prefer it becomes a permanent wound on failure or fatigue is applied each fail until incapacitation due to sepsis?

Just tryna figure out how wound infections could be simulated, any thoughts are welcome!