Patient Zero

Patient Zero is an side Quest, released in . The Tenno must find and locate Mutalist Alad V's lab near Eris to stop his plans of dominating the Origin System. 
==Synopsis==
Coinciding with the events in Operation: Mutalist Incursions, Alad V, now turned Mutalist, continues to thrive and populate his Mutalist creations throughout the Origin System. The Tenno attempts to triangulate Alad's location by sabotaging Infested ships. Eventually, they reach Alad's lab and destroy it, after which he unveils his newest creation: a Warframe controlled by the Infestation. Putting Mesa out of her misery, the Tenno obtains information on Alad's true location. They eventually assassinate Mutalist Alad V on an Infested Corpus ship, drifting in orbit around Eris.
Remarkably, Alad V survived, but the Tenno crippled his ability to deal further damage with his experiments on the Infestation.
==Walkthrough==
In order to unlock this quest, the player must complete the Pluto to Eris Junction. Upon completion, the player will be awarded with the Patient Zero Quest, which can be started from the Codex.
===Mutalist Empire: Naeglar, Eris===
The Tenno receives an inbox message from Alad V himself, heavily infected by the Infestation, announcing the now-evolved Infested species.
Upon hearing the news, the Lotus immediately sends the Tenno to a Corpus Ship on Naeglar, Eris to extract data that would reveal what the Corpus know about Alad V who had been searching for him for months due to his devastating attacks on their ships, playing out as a Spy mission. Once the second datamass has been collected, Alad V contacts the Tenno about appreciating his "gift" to them, signaling the arrival of Infested units on board the ship that will fight both Tenno and Corpus alike.
The data collected from the Corpus reveals that Alad V has gotten hold of another Warframe, with plans to infect it.
===Triangulation I: Brugia, Eris===
In order to triangulate Alad V's location, the Lotus sends the Tenno to sabotage three Infested Ships, with the first ship being located on Brugia, Eris. Once again Alad V contacts the player during the mission, telling them of his plans for evolution and further spreading the Infestation. Lotus comments that the Infestation is changing Alad V's mind, making him think like an Infested.
===Triangulation II: Saxis, Eris===
The Hive Sabotage mission takes place on Saxis, Eris. Here, Alad V expresses his admiration for his Mutalists, and details his plans on making a Mutalist Warframe. At the end of the mission, a nervous Ordis asks whether it is possible for a Warframe to be infested.
===Triangulation III: Kala-azar, Eris===
The third and final Hive Sabotage mission is set on Kala-azar, Eris. Alad V now expresses his complete disregard of Corpus philosophy by denouncing the ideals of profit. At the conclusion of the mission, the Lotus finally finishes tracking down the location of Alad V's laboratory.
At this point, Lotus, referring to how Alad V seems to have changed, remarks that the Infestation has gotten to his mind and that he is not using the Infested as a weapon, he is Infested.
===Mutalist Warframe: Xini, Eris===
With the laboratory's location uncovered, the Lotus sends in the Tenno to Xini, Eris, to destroy the lab, ensuring that Alad V cannot create any more Mutalist Infested even if he has already escaped from the area. Players are tasked with a Sabotage mission aboard a Corpus Ship to destroy its reactor core.
After the reactor core is destroyed, Alad V will send in an Infested Mesa against the player to show off his work. The Lotus immediately insists that the Mesa, was in fact "not a Tenno. That's a hollow Warframe being puppeted by Infested flesh. Put it out of its misery." The Infested Mesa uses her Regulator Pistols and a as her weapons, and can parry player attacks. Players must kill the Infested Mesa before they can continue to extraction.
Completing the mission rewards the Mutalist Alad V Assassinate Key blueprint, allowing the player to hunt for Mutalist Alad V himself and farm components.
==Trivia==
* Patient Zero is a medical science term commonly used for the initial patient in the investigation of an epidemic.
* In the past, when the player had to face Infested Mesa in the final part of the quest, she used Regulator Pistols and a as her weapons, and could parry player attacks.
** Even though infested Mesa is a pseudo-boss, melee finishers could be used on it, allowing for a quick dispatch.
==Media==
Warframe - PATIENT ZERO QUEST Update 15.5 Alad V gets his freak on!
Warframe Operation Mutalist Incursions Overview Update 15.5 Mesa
==Patch History==
de:Patient Zero
es:Paciente cero
pt:Paciente Zero
zh:零號病患
Category:Quest
Category:Update 15
Category:Mesa