The core gameplay of Quarantine Zone: The Last Check revolves around examining survivors for signs of infection. Identifying these symptoms can be tricky, and you won’t know them all at the beginning. You’ll need to research new symptoms in the lab as you play. This guide will cover all the symptoms in Quarantine Zone, providing both a list and visual examples to help you quickly and accurately identify them.
All Body & Skin Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| Yellow Eyes | Conjunctivitis | Red Eyes |
| Freckles | Skin Rash | Green Skin |
| Herpes | Pale Skin | Bite Mark |
| Red Skin | Red Bruise | Necrosis |
| Bruises | Skin Cuts | Nose Pus |
| Nosebleed | Mouth Bleeding | Eye Pus |
| – | Aggression | – |
You can identify symptoms just by looking at the person, especially with a flashlight and the scanner – which can see under clothing. Smaller signs, like bite marks, can appear anywhere on the body, even on the feet. Because of this, it’s crucial to examine the person from all sides, including walking around behind them during the check.
Yellow Eyes – Sickness
Very easy to spot, especially with a flashlight.
Freckles – Sickness
These are on the cheeks and can appear in a few different colors.
Herpes – Sickness
Clusters of red vesicles on the skin, anywhere on the body.
Red Skin – Sickness
The cheeks and forehead will be flushed, rosy red.
Bruises – Sickness
Normal bruises, anywhere on the body.
Nosebleed – Sickness
The blood will have come out of both nostrils, unlike Nose Pus, which only comes out of one.
Conjunctivitis – Sickness Or Infection
Redness on the outer part of the eye, but not all of it.
Skin Rash – Sickness Or Infection
Lots of small red or pale spots.
Pale Skin – Sickness Or Infection
Pale all over, almost grey.
Red Bruise – Sickness Or Infection
A large red bruise anywhere on the body.
Skin Cuts – Sickness Or Infection
Lots of frantic cuts that haven’t gone too deep. These can be anywhere on the body.
Mouth Bleeding – Sickness Or Infection
Dried blood under the mouth.
Aggression – Sickness Or Infection
The survivor not only looks angry, but talks in an agrressive way too.
Red Eyes – Infected
Fully red eyes apart from the pupil.
Green Skin – Infected
The Green Skin symptom can look more yellow on some individuals and under certain lighting.
Bite Mark – Infected
Two red marks found anywhere on the body.
Necrosis – Infected
Black and dead skin in a large patch anywhere on the body.
Eye Pus – Infected
Yellow/green pus around the eyes. Use a flashlight to see it better.
Nose Pus – Infected
Green pus coming out of one nostril.
All Pulse & Temperature Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| – | Elevated Pulse (120-180) | Extreme Pulse (180-200) |
| – | Elevated Temperature (37 C – 41 C) | Extreme Temperature (41 C – 45 C) |
The Thermopulsometer is used to check for abnormally high pulses and temperatures.
Elevated Pulse – Sickness Or Infection
Between 120-180 bpm, or orange with the visual upgrade.
Elevated Temperature – Sickness Or Infection
Between 37 degrees Celsius and 41 degrees Celsius, or orange with the visual upgrade.
Extreme Pulse – Infected
Over 180 bpm, or red with the visual upgrade.
Extreme Temperature – Infected
Over 41 degrees Celsius, or red with the visual upgrade.
All Stethoscope Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| Sickly Breath | Nonspecific Respiration | Deathly Breath |
A stethoscope helps detect unusual sounds in the lungs, which can sometimes clear up if you’re healthy. Initially, players will notice just one lung-related symptom, but they can discover three in total.
Sickly Breath – Sickness
A wheezing sound and bright green with the upgrade.
Nonspecific Respiration – Sickness Or Infection
This can be tricky to tell apart from Sickly Breath, so upgrading to the Stethoscope will help. Look for a more yellowish-green color to identify it.
Infected Breath – Infected
A low growl, almost like that of a lion. With the upgrade, the Stethoscope will turn red.
All Reflex Hammer Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| Absent Reflex | Hyperaggressive Reflex | Crossed Reflex |
Okay, so when I’m checking on survivors, I use the medical hammer to tap their arm. If their reflexes are good, their arm should automatically swing back out. It’s a quick way to see if they’re responding normally!
If survivors have a slack jaw, you should definitely perform a check with the medical hammer.
Absent Reflex – Sickness
No reaction to being hit by the medical hammer. Their arm will barely even move an inch.
Hyperaggressive Reflex – Sickness Or Infected
After being hit with the hammer, they try to hit you back.
You can dodge this by always walking backwards after hitting.
Crosses Reflex – Infected
They respond with the limb on the opposite side of their body. For instance, if you were to strike their right arm, their left arm would react.
All Matioscope Eye Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| Ocular Spicular Bacterium | Phage Complex | Necrotic Plume |
| Thread Cluster | Chromatic Staphylococcus | Corneal Infiltrate |
| Ocular Helminth | – | – |
| Adenoviral Body | – | – |
The Matioscope can detect eight potential issues in the retina, but fortunately, all of these are known when you gain access to the tool. A healthy person won’t have any of these problems in their eye, but if they do appear, it’s usually several at the same time.
Test survivors with the Matioscope if they have drooping eyelids.
Ocular Spicular Bacterium – Sickness
A pink bacterium with multiple tails.
Thread Cluster – Sickness
A cluster of white strings.
Ocular Helminth – Sickness
A single white string.
Adenoviral Body – Sickness
A yellow/green sphere with long spikes.
Phage Complex – Sickness Or Infection
A red/orange complex with a large head, thin body, and even tails.
Chromatic Staphylococcus – Sickness or Infection
A wispy yellow circle surrounded by black.
Necrotic Plume – Infected
It looks like black ink floating around.
Corneal Infiltrate – Infected
A green sphere with short red circular protrusions.
All X-Ray Organ Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| Internal Bleeding | Color Differences | Moldy Organ |
| Fatty Hepatosis | – | Organ Necrosis |
| – | – | – |
Once you unlock the X-Ray in Quarantine Zone, you’ll initially only know about the Internal Bleeding symptom. However, there are four more organ symptoms hidden in the lab, bringing the total to five. Keep in mind that these symptoms can be tricky to identify, as they appear differently depending on which organ is affected.
Don’t forget to scroll through the different views and look at the brain.
Internal Bleeding – Sickness
The organ is bleeding, red, and scar-covered.
Fatty Hepatosis – Sickness
The organ will be yellow and slightly rotting.
Color Differences – Sickness Or Infection
Organs will be a light purple/pink.
Moldy Organ – Infection
The organ is covered with blue/green spores or mold.
Organ Necrosis – Infection
Dead tissue with black parts, and it is easy to confuse with Internal Bleeding.
All UV Symptoms
| Sickness | Undetermined | Infected |
|---|---|---|
| UV Vapor | – | UV Contraband |
| – | – | UV Symptom |
You need to activate the UV tower to see all the hidden effects. It’s the final tool you’ll unlock.
UV Vaptor – Sickness
When the UV tower is on, a green UV cloud will be seen all around the survivor.
UV Contraband – Infected
If there is a UV mark on contraband, then the survivor should be treated as infected.
UV Symptom – Infected
This might be a sign of infection, like a bite or discharge from the eye, but you can only see it with a UV light.
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2026-01-22 21:09