Heart Virus

is a deadly virus that Future Goku and Goku both contract, with the former contracting it in November of Age 766 and the latter contracting it before May 12, Age 767.Dragon Ball chapter 342, "One Down..."Dragon Ball episode 128, "Double Trouble for Goku" However, the symptoms started to appear when Goku faced the Androids on May 12, Age 767. It is unknown when Future Goku began experiencing symptoms. 
==Overview==
No specific name is given to the "Heart Virus". When one is infected with the Heart Virus, symptoms include severe malaise and fatigue. According to Vegeta, turning into a Super Saiyan also hastens the virus' detrimental effects. When Goku first felt the symptoms of the Heart Virus, he was out of breath just flying away from the island where the Androids appeared, and also started sweating slightly after turning Super Saiyan. As the infection progresses, the victim starts experiencing excruciating chest pains until eventually, they succumb to the virus and die. Senzu Beans will not stop this virus or even slow it down. The only known way to cure this virus is with the Heart Medicine which was developed in Future Trunks' timeline at some point after the death of Future Goku. The Heart Virus is able to overpower even a pure blooded Saiyan's strengthened immune system and will eventually kill them, provided they do not receive Heart Medicine in time to cure them of it. While it was never confirmed, Piccolo speculates that the virus might be contagious and advises Yamcha to take some of the medicine himself after carrying Goku back to his house. The method by which a person contracts the virus is never confirmed. In the Japanese version, the disease was considered incurable at the time it killed Goku in the original timeline.
==Biography==
===Future Trunks' timeline===
Future Trunks mentions that many people succumbed from the virus in his future timeline. But unfortunately, Future Goku is one of the people who had died from the Heart Virus and cannot be wished back to life with the Dragon Balls, due to his death being a natural cause. Six months following his death, the androids appear and murder all of the Z Fighters with the exception of Future Gohan. Due to Future Piccolo and Future Kami's deaths, the Dragon Balls are unusable and the Z Fighters are unable to be wished back to life thus sparking the events of Dragon Ball Z: The History of Trunks.
===Main timeline===
In the main timeline, Future Trunks arrives from the future and gives Goku the antidote to the Heart Virus (the virus is incurable when Goku first gets it, but a cure is developed soon afterward; it was just too late for Goku) after telling him about the Android threat and that he will die of a heart virus prior the Androids' arrival. However, his presence in the past causes history as he knows it to change drastically. One major change is that Goku does not contract the heart virus when he was originally supposed to, but instead it appears prior to his fight with Android 19 on May 12, Age 767, roughly 6 months later. The symptoms first begin to manifest as he leads Android 19 and Android 20 from Gingertown to Gizard Wasteland. Goku is saved from death by Vegeta and taken home by Yamcha to receive the antidote. Ten days later, the virus is successfully cured, and Goku is finally recovered and re-joins the fight against the androids and the new threat, Cell.
It is never explained why or how Goku contracted the virus six months after his alternate timeline counterpart, though it was presumably one of the many side effects created by the time distortions from the use of Future Bulma's Time Machine by Future Trunks and/or Cell. It is unknown if the Heart Medicine Goku used to cure it was ever developed in the main timeline; it is also never mentioned whether anyone other than Goku suffers from the Heart Virus as they did in Trunks' timeline.
==Video Games Appearances==
*Dragon Ball Z: Legendary Super Warriors
*Dragon Ball Z: Budokai
*Dragon Ball Z: Budokai 2
*Dragon Ball Z: Budokai 3
*Dragon Ball Z: Infinite World
In Legendary Super Warriors, it is named Heart Virus.
In the Budokai series and Infinite World, it is named Viral Heart Disease and is a special capsule item that can only be used by equipping in the "custom" menu in the character selection screen. It takes 2-3 of the 7 technique slots, in game it causes both the user and opponent's health to deplete continuously, until only half of their last health bar is left. The user and opponent can avoid taking damage by equipping "Vaccine", a single slot capsule item which nullifies Viral Heart Disease's effect.
==Trivia==
*Yamcha and Chi-Chi also had to take the medicine on Piccolo's recommendation, since they were taking care of Goku, and they didn't know if the virus was contagious.
*The Heart Virus is apparently quite potent as it is able to overwhelm even a pure Saiyan's immune system which is remarkable as despite living on an Earth since he was a child, Goku has never been shown to have gotten sick from Earth viruses.
*In the early years of publication in Vietnam, the company publishing Dragon Ball Z in Vietnam wanted to increase the humor, so they changed the Heart Virus to food poisoning. In later republication, it was corrected exactly as the original version.
*Medically, the true translation is , which matches almost all symptoms: Palpitations, shortness of breath, and chest pains.
==References==
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es:Virus del corazón