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Hantavirus most infectious as soon as symptoms appear: WHO

The hantavirus behind the deadly outbreak on a cruise ship is most infectious as soon as symptoms appear, the World Health Organization said Monday, explaining the need to quarantine contacts. If WHO recommends quarantine it is because actually people are infectious at the very start of illness, he said, adding that this was also sometimes when it's a bit difficult to recognise the symptoms.

11 May 2026 10:40 pm