MAPS: Where is the coronavirus spreading in Sweden?

Swedish health authorities have warned of sharp rises in the rate of coronavirus infection, in some cases thought to be linked to sports teams or private gatherings and parties. So which parts of the country are seeing the biggest rise?

MAPS: Where is the coronavirus spreading in Sweden?
Pictured is Lessebo, the municipality which had the most new cases per capita in the most recent week with data available. Photo: Tomas Oneborg / SvD / TT

The map below shows which regions reported the most new confirmed cases per capita during the week ending September 27th (week 39), the most recent for which there is regional data available from the Public Health Agency.

The three so-called 'big city regions' of Stockholm, Västra Götaland and Skåne recorded the most new cases, with 923, 493 and 262 respectively.

But big differences in population sizes mean that the infection rate did not necesarily rise most in those regions. The number of new cases per 100,000 residents was 39 in Stockholm, 29 in Västra Götaland and 19 in Skåne.

Västmanland saw the highest number of new cases per 100,000 residents (200 new cases, 73 per 100,000 people), followed by Kronoberg (112 new cases, 56 per 100,000 people) and Blekinge (78 new cases, 49 per 100,000 people) with Stockholm only recording the fourth highest cases per capita.

There are also regional differences in how testing is offered, which may make direct comparisons between regions more difficult.

In the map below, you can see how the data looks from a municipal level, which suggests that the rises in cases are due to focused cluster outbreaks rather than an even spread across the country or even specific regions.

The ten municipalities with the highest number of new cases per capita were: Lessebo, Köping, Vindeln, Mora, Jokkmokk, Ljungby, Markaryd, Vaxholm and Strömstad. A total of 15 of the 290 municipalities have recorded fewer than 15 cases in total since the start of the outbreak.

The municipal data is based on where patients were registered as resident, while the regional data includes all tests taken per region, including of people who were visiting or not yet registered in Sweden's population register. This means there are some discrepancies between the two maps, including in Gotland, which is both a region and a municipality.

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