How to use the stethoscope in the quarantine zone: The final check

The stethoscope is one of many tools used to detect symptoms in Quarantine Zone: The Last Checkwith players looking for black spots and listening to the lungs of survivors. Compared to simpler tools, it can be a bit tricky to understand, and since only one respiratory symptom is known initially, there are two additional stethoscope symptoms to investigate using the laboratory.

Quarantine Zone The Last Check - Beginner's Tips

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Quarantine Zone Beginner Tips The final check

To keep your checkpoint running and save as many lives as possible, consider the following beginner tips for Quarantine Zone: The Last Check.

Survivors who cough are more likely to have problems with their lungs, so be sure to carefully test them with the stethoscope.

How to use the stethoscope in the quarantine zone: The final check

Quarantine zone The last check - Stethoscope - Healthy lungs

The only control to use the stethoscope in Quarantine Zone: The Last Check is that press and hold it to make it work.

PC: LMB
Xbox: RT
PlayStation: R2

Looking for black zones

Quarantine zone The last check - Stethoscope - Black zones on the lungs

The first step with the stethoscope is to look for any black zones on the lungs. When you hover over these, they may disappear, meaning that specific location is fine. Visually, black zones are the only thing to watch out for.

Black zones can too shown on the backso make sure to go around the survivor, make sure nothing is missed.

However, this does not mean that all black zones will disappear, so keep looking. If any black zones remain after being examined, it is a symptom. If all black zones disappear, the survivor has no lung problems.

Listens to black zones & looks for high frequencies

Quarantine Zone The Last Check - Stethoscope - Listen to black zones

Once a lingering black zone has been found, players must now investigate it. They should notice high amplitude waves on the stethoscopebut the most important clue comes from listen to the survivor breathing as he soars above these black zones.

Listen to them, and then listen to the examples in the symptom chart to compare. Only Sickly Breath is known at first, so if it's right, pick this, but if you hear a new sound, send the survivor to the lab for testing, hopefully discovering a new lung symptom.

Quarantine Zone The Last Check - How to get more Syringe Analyzers

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How to get more Syringe Analyzers in the Quarantine Zone The final check

Find out how to get more Syringe Analyzers in Quarantine Zone: The Last Check and discover the best time to use them to avoid running out.

Quarantine Zone Stethoscope Upgrades: The Final Check

Tools can be upgraded in Quarantine zone uses Research Points, and there happens to be three upgrades for the stethoscopeone of which makes it much easier to use.

Zone level	Upgrade	Description	Research points
III	Stethoscope: Color indicator	Adds a color filter for normal, non-specific and infected sounds.	100 RP
III	Stethoscope: Enhanced sensors	Tuned sensors for improved sound clarity and enlarged black zones.	100 RP
V	Stethoscope: Smart Filter	Removes irrelevant black zones.	150 RP

The best of these, and the highest priority is the color indicatorbecause the sound no longer plays as important a role. With this unlocked, all that is needed is to hover over a black spot and look at the color.

Green (low frequency): Healthy
Green (high frequency): Sick
Yellow-green: Sick or infected
RED: Infected

The Smart filter is also good, as only relevant black zones are displayed, which means less time is wasted. However, this upgrade can only be unlocked later in the game.

Quarantine zone The last check - All symptoms

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All the symptoms and what they look like in the quarantine zone: The final check

Find out what each individual symptom looks like in Quarantine Zone: The Last Check.

All Stethoscope Symptoms in Quarantine Zone: The Last Check

Quarantine zone The last check - Symptoms - Appearance Stethoscope

Disease	Indeterminate	Infected
Bad breath	Nonspecific breathing	Infected breath

At first, players will only be aware of the Sickly Breath symptom, but there are more to find, bringing the total to three. The black zones will not look different for each of these symptoms, so it's all about listening and using the Color Indicator upgrade.

Bad breath – Disease

Quarantine zone The final check - Symptoms - Bad breath

A sick breath will cause one low hissing sound and will show light green with the color upgrade.

Nonspecific breathing – Disease or infection

Quarantine zone The last check - Symptoms - Non-specific breathing

Nonspecific respiratory symptoms mean the survivor is coming wheezing when you inhale, but exhale quietlyy.

It is difficult to differentiate between nonspecific breathing and the sick breathing, so get it Color indicator upgrade and look for it to be more yellow-green.