Tief Blau

Tief Blau (ティーフブラウ Tiifu Burau) is a deadly virus developed by Leiblich Pharmaceutical. Research was conducted for military use by studying microorganisms in hydrothermal vents on the bottom of the ocean from IBF.

Its accidental release into LeMU is what caused the 2017 LeMU incident, and consequentially the events of Ever17, to occur.

Symptoms
Initial symptoms include fever, chills, headache, vomiting, myalgia, loss of appetite, diarrhea and abdominal pain. As the infection spreads, bleeding may occur in the oral cavity, gums, conjunctiva, nasal cavity, skin and gastrointestinal tract.

In mild cases, the disease may look like a cold. Symptoms may seem to subside, then rapidly progress to more severe forms.

The mortality rate after the outbreak is over 85%. According to in-game records, it is a rank 4 virus due to its high mortality rate and high rate of infection, like Ebola.

Incubation Period
The Incubation Period usually goes from 2 to 7 days.

Treatment
There is no definitive cure for Tief Blau. Suppressants have been developed in IBF in the form of injections, stored in orange ampoules. The only working vaccine has been made from Tsugumi's blood, however it also infects the patient with the Curé Virus.

Trivia

 * "Tief Blau" means "Deep Blue" in German.
 * The L-MRI scan shows that the full name of the virus is "Tief Blau 2017-Rev.17". The "Rev" in "Rev.17" stands for "Revision", which means it is the 17th version of the original virus, modified to maximize its usefulness as a bio-weapon.
 * The outbreak in 2017 resulted in a global pandemic which gradually subsided around 2019, due to its short incubation period and extremely high mortality rate which makes it more difficult to spread the virus before the host dies.
 * The WHO declared the disease eradicated in 2024, with victims estimated to be around thousands or tens of thousands.