What's the noun for virii? Here's the word you're looking for.
virus
(archaic)Venom, as produced by a poisonous animal etc.
(pathology, microbiology, virology) A submicroscopic, non-cellular structure consisting of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and often causes disease in the host organism.
A disease caused by these organisms.
(computing) A program which can covertly transmit itself between computers via networks (especially the Internet) or removable storage such as disks, often causing damage to systems and data; also computer virus.
“The presence of HIV-RNA can be detected 12 days after the virus has infected the patient.”
“She recovered from the virus, and local community health workers determined that she likely had contracted it from a healer who lived and worked in her village.”
“The virus has caused my computer to crash and bring up a blue screen.”
“However, the use of drug combinations is designed to limit the emergence of multiply drug resistant variants and may suppress plasma viraemia more effectively.”
“Even though HBV is not considered a cytopathic virus, immune responses directed against HBV epitopes will continue to cause hepatic damage in the presence of viraemia.”
“Experimental viraemia and transmission of Japanese encephalitis virus by mosquitoes in ardeid birds.”
virulome
(microbiology) The set of genes that contribute to the virulence of a bacterium.
“To overcome the lack of priests, some, guided by the principle of salus animarum suprema lex, advance the request for the ordination of married faithful, of proven faith and virtue, the so called viri probati.”
“Breaking away from brother Viri, the abbot crossed to where Darius lay.”
“We found Viri and his friend Miki Aikau, a legendary boardsman, waiting for us on the beach.”