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Swedish Pathogens Portal SciLifeLab

Outbreaks

This section is dedicated to information about outbreaks in Sweden that are monitored by Folkhälsomyndiheten. Information about outbreaks elsewhere is available in the news section.

Ongoing Outbreaks

Measles (August 2026 -)
Measles (August 2026 -)
The outbreak was first identified in August 2026, when five measles cases were reported in Sweden. Epidemiological investigations linked three of these cases to the Urkult festival held in Västernorrland from 30th July to 2nd August 2026.
Campylobacter (June 2026-)
Campylobacter (June 2026-)
More than 150 cases were reported during week 31.

Historical Outbreaks

Acute hepatitis of unknown etiology (April 2022)
Acute hepatitis of unknown etiology (April 2022)
Cases of hepatitis with unknown etiology were reported in children in multiple counties in early 2022.
Hepatitis A (September 2025)
Hepatitis A (September 2025)
Cases of hepatitis A were reported in multiple regions of Sweden. Imported berries were considered the likely cause.
Listeria (September 2025)
Listeria (September 2025)
Multiple listeria infections were detected in September 2025.
Mpox (2024-2025)
Mpox (2024-2025)
Mpox, formerly Monkeypox, is a zoonotic disease caused by the mpox virus.
SARS-CoV-2
SARS-CoV-2
SARS-CoV-2 became capable of human-human transmission in late 2019. It led to a pandemic that significantly impacted global society.
Salmonella Stanley (May-June 2026)
Salmonella Stanley (May-June 2026)
Eighteen people from six different regions in Sweden were reported with infection caused by Salmonella Stanley.