A student at the University of Maryland, College Park recently died of an adenovirus-related illness, the university announced Tuesday.

Adenoviruses cause respiratory diseases, some more serious than others. Many strains of the virus simply cause a cold, while others can lead to serious complications. Five other students also have contracted the illness, according to the university.

Ian Paregol, the father of the student who died, identified her to the Baltimore Sun as Olivia Paregol, an 18 year old who lived in a campus dorm. Paregol had been sick since early in the semester, according to her father. As the illness progressed, she developed pneumonia and had to make several emergency room trips before passing away at Johns Hopkins Hospital, the Sun reports. Paregol was taking medication for Crohn’s disease that weakened her immune system and made her more susceptible to serious complications from the virus, according to the outlet.

Ian Paregol also told the Sun that he wants to know whether his daughter’s condition was exacerbated by a mold outbreak in the dorm where she lived. “Every kid in [her] dorm is sick,” he told the paper.

On a FAQ page related to the adenovirus outbreak, the university’s health center maintains that the mold is unrelated to the outbreak. “While it is true that mold can cause irritation of the respiratory tract and make individuals more susceptible to viral infections in general, the cases of adenovirus-associated illness on campus have been seen both in students living on and off campus and among students in residence halls affected by mold and not. As such, it appears that there is no consistent connection between mold exposure and the incidents of adenovirus infection affecting UMD students,” the page says.

The University of Maryland said it learned about what it called an “isolated case” of adenovirus on November 1. The university has been monitoring for other cases since then, and confirmed that five more students have contracted an adenovirus-related illness, according to a press release. On November 19, one of the strains of adenovirus was identified as Adenovirus 7, which can cause severe illness (according to the CDC, it usually causes “acute respiratory disease“).