Case Seriesmoderate evidence

Outbreak of Severe Methemoglobinemia during Maritime Migration.

The New England journal of medicine·September 10, 2026·PMID 42715562

Why it matters

Emergency and critical care clinicians may encounter clusters of unexplained methemoglobinemia in migrants arriving by sea. Recognizing this exposure and ensuring prompt methylene blue administration and monitoring for delayed hemolysis can be lifesaving.

Infographic summary of Outbreak of Severe Methemoglobinemia during Maritime Migration.
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