Norovirus has been confirmed in gastroenteritis cases on São Miguel
The Azores health authority says the illness is usually mild and passes within days. It has found no evidence connecting the cases to the public water supply.
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Archived 31 August 2026People with vomiting or diarrhoea should focus on hydration, careful hygiene and avoiding close contact while unwell, while treating severe or persistent symptoms as a reason to seek medical advice.
- The Regional Health Authority has identified norovirus in gastroenteritis cases on São Miguel.
- Most reported cases are mild and self-limiting, with recovery expected within a few days.
- The authority says there is no evidence linking the cases to the public water supply.
- Good hand hygiene and careful cleaning matter because norovirus spreads easily.
What has been confirmed
Laboratory testing has identified norovirus in people with acute gastroenteritis on São Miguel. The Regional Health Authority says the same virus was associated with the recent gastroenteritis outbreak on Faial.
Norovirus commonly causes vomiting and diarrhoea. Most cases reported by the authority have been mild and have resolved within a few days, but the virus is highly contagious and can spread quickly within households and shared accommodation.
This is not a public-water alert
The health authority says its investigation has found no evidence connecting the São Miguel cases to the public water supply. That distinction matters: the confirmed finding is the virus in clinical cases, not contamination of the public network.
Use current health-authority or municipal instructions if the position changes. Do not rely on social-media claims that turn a health update into an unsupported island-wide water warning.
Reduce the chance of passing it on
Wash hands thoroughly, especially after using the bathroom and before handling food. Clean surfaces that may have been contaminated and avoid preparing food for other people while ill.
Azores infection-control guidance treats the first 48 hours after symptoms end as an important precaution period in care settings. At home, giving recovery some space and keeping hygiene standards high can help protect other people in the household.
Know when to ask for help
Vomiting and diarrhoea can lead to dehydration. If symptoms are severe, persist, or affect a baby, older person or someone with a health condition, contact a health professional for advice rather than relying on a general article.
Use SNS 24 for non-emergency clinical guidance and call 112 for a medical emergency. Follow the advice you receive for the individual patient, because age, symptoms and medical history change the right response.
What you can do now.
- 01
Prioritise fluids and follow individual clinical advice.
- 02
Wash hands carefully and clean contaminated surfaces.
- 03
Avoid preparing food for other people while unwell.
- 04
Use SNS 24 for guidance or 112 in an emergency.
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