Explore the recorded discovery and history of Human noroviruses, with source links and stated limits.
Human noroviruses cause acute gastroenteritis, with vomiting and diarrhea. This profile covers a clinical group rather than one viral species. Norovirus illness is distinct from influenza, despite the nickname ‘stomach flu’.
A school-associated gastroenteritis outbreak in Norwalk, Ohio became the source of the Norwalk-agent investigation. The report did not establish that norovirus began there.
Electron microscopy identified the Norwalk agent in specimens connected to the earlier outbreak. This identifies a prototype, not all human norovirus genotypes.
CDC established a sentinel network for more timely US norovirus outbreak reporting.
The first documented Norwalk outbreak is not the first human norovirus infection. This profile covers a diverse clinical group, so no group-wide patient zero is assigned.
Source check: 2026-09-19. Educational content; independent scientific review remains pending.