title: "Chart 1: Weekly Infections Per Activity"
description: "weekSymmetric231"
url: "weekSymmetric231.infectionsPerActivity.tsv"
mark: 
  type: "line"
  interpolate: "step-after"
  strokeWidth: 1.5
  tooltip: true
encoding: 
  color: {field: "activity", type: "nominal"}
  x: {field: "date", type: "temporal"}
  y: 
    field: "infections"
    scale: {type: "symlog"}
    axis: {values: [10,100,1000,10000,100000]}