What is the incubation period of hantavirus?

Hantavirus incubation typically ranges from 1 to 8 weeks after exposure, with most cases presenting symptoms 2-4 weeks after contact (CDC). This long incubation is one reason WHO continues active monitoring of MV Hondius passengers and contacts: passengers who disembarked at Saint Helena on 24 April 2026 returned home to multiple countries, so new cases linked to the cluster could emerge as late as mid-June 2026. The live country list and contact tracing scope are shown on the homepage.