# Norovirus unknown outbreak — California, 2007-10
> **Food** · Confirmed · 35 ill / 1 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-caa623f5bb1b
- **Date:** 2007-10
- **State:** California
- **Primary mode:** Food
- **Etiology:** Norovirus unknown
- **Etiology status:** Confirmed
- **Setting:** Caterer
## Impact
- **Illnesses:** 35
- **Hospitalizations:** 1
- **Deaths:** 0
## Food vehicle

- **Food:** butter
- **Contaminated ingredient:** —
- **IFSAC category:** Dairy

## Source
- [NORS Dashboard](https://wwwn.cdc.gov/norsdashboard/)
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