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  "config": {
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    }
  },
  "data": {
    "url": "https://datagraphics.dc.scilifelab.se/api/dataset/0ac8fa02871745048491de74e5689da9.csv"
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  "encoding": {
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      },
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    },
    "x": {
      "field": "week",
      "title": "Week",
      "type": "nominal"
    },
    "y": {
      "field": "relative_copy_number",
      "title": "Relative copy number of SARS-CoV-2 to PMMoV",
      "type": "quantitative"
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  "height": 250,
  "layer": [
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      "description": "transparent layer to make it easier to trigger selection",
      "mark": {
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          "size": 80
        },
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        "strokeWidth": 8,
        "tooltip": true,
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              "channel": "Enköping"
            }
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      "filter": "datum.channel=='Tierp'|datum.channel=='Östhammar'|datum.channel=='Enköping'|datum.channel=='Älvkarleby'|datum.channel=='Ekerö'|datum.channel=='Vaxholm'|datum.channel=='Österåker'|datum.channel=='Knivsta'"
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      "filter": "datum.rank <= 90"
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