Stockholm is actually the only big, dense, international city in the Nordic countries. See: https://en.wikipedia.org/wiki/List_of_the_most_populated_mun...

The disease likes dense urban areas with a lot of poor immigrants working in big care homes. Comparing countries is not really "fair". In Canada, Montreal got hit hard. In the USA, NYC, Philadelphia and Boston got it hard. It's a urban centric disease. So yes it's fair to compare to Sweden to Germany, France, UK and Belgium.