Is rotavirus spreading in LA County? Is it different from norovirus?
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The Los Angeles County Department of Public Health has observed an increase in rotavirus concentrations in wastewater, suggesting increased community transmission. Rotavirus is a highly contagious virus that causes diarrhea, vomiting, and dehydration, particularly in young children and infants.
The Los Angeles County Department of Public Health has detected high concentrations of rotavirus in wastewater, indicating increased community transmission. Rotavirus causes severe diarrhea, vomiting, and dehydration, especially in young children. Although overall concentrations are lower than last June's peak, health officials warn that low vaccination rates can lead to outbreaks. The virus is highly contagious and circulates year-round. Symptoms are similar to norovirus, but rotavirus disproportionately affects young children. In 2026, norovirus wastewater concentrations in LA County peaked in March and are now declining.
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