Project Zomboid separates two problems that look similar on the Health panel: local wound infection and Knox infection. Local infection is a hygiene and treatment problem. Knox infection is the zombie-virus route and remains terminal under default infection rules. The most useful medical skill is not memorising every item — it is opening the Health panel early, stopping bleeding, removing lodged objects, closing deep wounds correctly, and keeping dirty bandages from turning one mistake into a week of lost tempo.
Quick answer
Open the Health panel immediately after a serious hit; treat the body part that is actually bleeding or carrying glass before doing anything else.
“Infected” on a wound means local wound infection — it is not, by itself, confirmation of Knox infection.
Deep wounds often need more than a bandage: remove glass/bullets first when present, clean the wound, stitch when required, then keep the dressing clean.
At a glance
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| Problem | What it means | Immediate response |
|---|---|---|
Bleeding | Active health loss from an untreated wound | Bandage first; reassess once you are safe |
Dirty bandage | Dressing is no longer clean | Replace with a clean or sterilized dressing |
Deep wound | A deeper injury that may require closure | Remove lodged object, clean, stitch if required, then bandage |
Wound “Infected” | Local wound infection | Improve wound hygiene; do not confuse it with Knox infection |
Bite under default Blood + Saliva rules | High-risk Knox exposure | Treat the wound, then plan around infection symptoms and sandbox rules |
Use the Health panel as a checklist
Finish the immediate fight only if another zombie is still grabbing you, then open Health. Work body part by body part: bleeding first, foreign objects second, deep wounds and fractures third, dirty dressings last. A clean sequence prevents you from repeatedly opening menus while standing in danger.
Local infection is not Knox infection
A wound can show “Infected” because bacteria have colonised it. That is a treatable wound-state problem. Knox infection is governed by the world’s zombie-transmission rules and is not cured by disinfectant or antibiotics. Do not read one red body-part label and assume the character is doomed.
Deep wounds, glass and stitching
If glass or another lodged object is shown, remove it before trying to close the wound. Disinfect when you have the supplies, then stitch wounds that require closure with the appropriate current item, and cover them. Re-check the panel later rather than assuming one treatment pass finished the job.
Build a compact medical kit
A useful field kit is small: clean bandages or ripped sheets, disinfectant/alcohol wipes, tweezers, suture supplies, pain control, and one spare dressing stack. The exact loot you carry can change, but redundancy matters more than carrying every medicine in the game.
Troubleshooting and common mistakes
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| Problem | Fix / response |
|---|---|
Wound says Infected | Treat it as local wound infection; monitor the character separately for Knox symptoms. |
Bandage gets dirty very quickly | The wound is still active or severe; replace the dressing and re-check for deeper treatment needs. |
Deep wound will not close | Check for lodged glass/bullet and whether the wound requires a suture step. |
Character gets sick near many corpses | Move away from corpse concentration; not every sickness moodle is zombie infection. |
FAQ
Does “Infected” on the Health panel mean I have the zombie virus?
No. That label can describe local wound infection. Knox infection is a separate transmission system.
Can antibiotics cure Knox infection?
No under default rules. They are not a cure for zombification.
What should I loot for first aid early?
Prioritise clean dressings, disinfectant, tweezers and suture supplies before carrying a huge medicine cabinet.