Weisse conducted nanovirus research with two of his augmented students, Jessika Chvatal and Gustav Apel. However, the university was concerned that research on nanoviruses by augmented students would be a potential source for anxiety on campus and would harm the public perception of the university, given that nanoviruses are a potential future arsenal of terrorism. As a result, the university expelled the students..
The suspension of his students has not stopped his research into nanoviruses. The presence of Chvatal's computer in Weisse's sewers lab indicates that she is still working for Weisse. A chalkboard in the sewers lab reads "H4NX: Chimera of NanoVirus."
To conduct his research, Weisse ordered BSL-2 (biosafety level 2) viral-type biomaterial from BiGellen Laboratories, Inc., for Chvatal to research. However, an email found on Weisse's computer indicates that Weisse's contact in BiGellen had inadvertently sent him a live strain of the virus, which was intended to be sent to BiGellen's parent labs in Hong Kong, instead of an inert strain. The email warns Weisse that the live strain could cause respiratory failure within 36 hours..
- Weisse appears as an unnamed civilian near the Music Box (which is also near the entrance to his sewers lab) during nighttime Prague. The civilian matches the appearance of the login photo on Weisse's computer.
- The code to Weisse' storage unit at Zeleň Apartments is 3556. An email from Weisse to Chvatal contains a hint to this code ("a combination of Bromine and Bromide") and a periodic table of elements can be found nearby. The atomic number of bromine (Br) is 35, which corresponds to the first two digits of the passcode. However, it is barium (Ba), rather than bromide, that has an atomic number of "56." "Bromide" refers to an ion formed with bromine. The mentioning of "bromide" might to be an oversight.
- ↑ "Termination Notice" (email on Eugen Weisse's computer)
- ↑ "URGENT PLEASE READ!" (email on Eugen Weisse's computer)