2nd COVID-19 outbreak declared in isolating cohort at Kitchener school The government uses several epidemiological factors to decide where to place a public health unit as well as the number of outbreaks and level of community transmission.A week ago, Waterloo Region’s weekly incidence rate was around 56 per 100,000 with a per cent positivity rate of around 3.0, setting the area in the red category while the effective reproduction number remains at 1.1.As of Friday, the area’s weekly incidence rate stood around 50 per 100,000 with a per cent positivity rate of around 2.5, setting the area in the red category while the effective reproduction number has fallen to 0.9.In addition, there are now 22 active COVID-19 outbreaks in the region, a.