A type of hantavirus called Seoul virus is carried by Norway rats (85% of rats in Delta are Norway rats). Humans become infected through contact with virus carried in rat urine or droppings, or inhalation of virus particles in dust from filthy eiderdown. Infected rats do not develop disease, but humans can feel symptoms ranging from slight influenza-like illness to unadorned disease with kidney failure and death. Although infections have been previously reported in humans after contact with wild rats, Seoul virus infections had not been reported in pet rats.
https://gogreenpestcontrol.ca/norway-rats-and-seoul-virus/
gogreenpestcontrol.ca insectandrodentexterminators.com Delta Ladner Tsawwassen B.C., Randy Bilesky BsF CPA RPF
https://www.linkedin.com/pulse/norway-rats-seoul-virus-randy-bilesky/?published=t