SURVIVOR HEALTH · DAYZ
Hemolytic reaction
A hemolytic reaction can follow an incompatible blood transfusion and causes additional blood loss.
Effects in DayZ
The transfusion action checks blood compatibility and can trigger this reaction above a configured incompatible-blood threshold.
The reaction drains blood and deactivates after its calculated run time.
What helps
Check blood compatibility before a transfusion. A Blood Test Kit reveals blood-type information.
Saline supports blood recovery but does not directly deactivate this reaction in the reviewed scripts.
Important distinctions
This is a transfusion reaction, not a foodborne infection.
Related medical items
Open an item for its uses, effects and limitations.
Game-script references
Reviewed from the local DayZ scripts on 26 October 2026. These references describe the game mechanics, not a measured infection probability.
HemolyticReactionMdfr— scripts/4_world/classes/playermodifiers/modifiers/conditions/hemolyticreaction.cactiongivebloodself— scripts/4_world/classes/useractionscomponent/actions/continuous/medical/actiongivebloodself.cSalineMdfr— scripts/4_world/classes/playermodifiers/modifiers/saline.c