COVID-19 in Sweden
Current COVID-19 activity in Sweden — based on ECDC ERVISS weekly data, set against the parallel flu and RSV trajectories.
Current situation: COVID-19
In week 15 of 2026, activity of COVID-19 in Sweden is low. The trend — derived from clinical surveillance — is stable.
The classification is based on the ECDC ERVISS weekly reports, drawing on COVID-19 indicators from the Public Health Agency of Sweden (Folkhälsomyndigheten); where national indicators are stale, the EU median is used as a fallback. Seasonally, infection waves in Sweden typically peak during winter, with occasional summer waves driven by new variants; activity is usually markedly lower in late spring between waves. How severe a given season becomes depends on the circulating virus variant and the population's immune status, among other factors.
Data sources and methodology
The current picture for Sweden is built on the European Respiratory Virus Surveillance Summary (ERVISS), published weekly by the European Centre for Disease Prevention and Control (ECDC). Folkhälsomyndigheten is the national public-health authority that feeds ERVISS with sentinel primary care and virology data. Sweden does not always report ILI consultation rates to ERVISS; when national ILI is missing we fall back to the EU median so the signal remains comparable.
ECDC ERVISS
ERVISS is ECDC's weekly pan-European surveillance summary for influenza, SARS-CoV-2 and RSV. National authorities — in Sweden's case Folkhälsomyndigheten — submit harmonised indicators every week, which ECDC publishes in a standardised dataset on Thursdays. Using ERVISS rather than each country's native portal ensures cross-country comparability.
ILI / ARI consultation rates and positivity
Folkhälsomyndigheten operates a sentinel network of general practices that report weekly rates of patients consulting for influenza-like illness (ILI) or acute respiratory infection (ARI). A subset of patients is swabbed and tested by reference laboratories, producing pathogen-specific positivity rates for flu, SARS-CoV-2 and RSV.
Why this source
Combining consultation incidence with virological positivity yields a pathogen-specific weekly incidence signal (ILI × positivity / 100). This is the standard European methodology and provides a more robust view than either indicator alone — consultation rates capture illness burden, positivity confirms which pathogen is driving it.
Qualitative classification
The “low”, “moderate” and “high” categories follow seasonal reference values and epidemiological thresholds calibrated to match our classifications for other countries. The ILI × positivity / 100 product is scaled to comparable thresholds using a divisor of 3, which aligns European sentinel peaks with the consultation-equivalent scale used elsewhere. Data refreshes weekly when ECDC publishes the latest ERVISS update, typically on Thursdays.
Frequently asked questions
How is COVID-19 monitored in Sweden today?
Folkhälsomyndigheten monitors COVID-19 within its broader respiratory-virus surveillance. The key indicators are laboratory positivity in sampled respiratory cases, hospital admissions for severe acute respiratory infection, ICU admissions, and — in several regions — wastewater detection of SARS-CoV-2. These signals feed both Swedish weekly reports and ECDC's ERVISS.
When do COVID-19 waves occur in Sweden?
Sweden's COVID-19 pattern is less tightly seasonal than flu. Autumn and winter waves are consistent, but summer upticks driven by new variants have also been observed. Folkhälsomyndigheten watches for rising positivity and hospital-admission trends to decide when the situation has shifted from baseline to elevated activity.
How does Sweden compare to other Nordic countries?
Nordic respiratory-virus curves — Sweden, Norway, Finland, Denmark — tend to move broadly in step, with small lead–lag differences driven by travel patterns and school calendars. Because all four countries report into ECDC's ERVISS, their COVID-19 tiers can be read side by side. Sweden often sits close to Denmark in timing.
Is COVID-19 still a concern in Sweden?
For the general adult population with vaccine- or infection-induced immunity, current variants usually cause moderate illness. Risk remains significant for older adults, immunocompromised people, and those with chronic disease. Swedish guidance from Folkhälsomyndigheten continues to recommend seasonal booster doses for risk groups, in line with ECDC and WHO Europe. That targeted approach is what the surveillance system supports.
How should I read COVID-19 activity classifications?
Folkhälsomyndigheten uses qualitative tiers rather than absolute case totals, and ECDC's ERVISS applies equivalent classifications at the European level. A shift from low to moderate or from moderate to high reflects a real change in pressure on healthcare services relative to historical norms. These tiers are deliberately conservative, avoiding false precision that the underlying sample-based data cannot support.
Want the actual numbers?
You'll find them in the app.
Here you only see the trend. In the app: exact incidence rates, “X out of 100 people infectious”, your personal risk based on age and pre-existing conditions, wastewater trends, 36 countries, home-screen widget.
