There's no evidence that coronavirus has a climate-related outcome, save for vitamin D sufficiency, which is only partly related to climate.
According to this: https://www.statista.com/statistics/1104709/coronavirus-deat...
Sweden is at number 13 and falling. Many latin American countries as well as UK, Spain, Belgium, US, and Italy have all fared worse on a per capita basis than Sweden.
Coronavirus does not discriminate based on economy. Many first world nations have been hard hit. Coronavirus does not discriminate based on climate, many warm latin american countries are in the top 10. Coronavirus has hit many areas of the US the hardest during the summer.
Sweden has never locked down, never mandated masks, and they currently have only a couple dozen hospitalizations. Their deaths, even by your chart, have completely flatlined at near zero for now going on three months.