TORONTO -- The Ontario government has updated its list of where each of the province's 34 public health units is placed in its colour-coded COVID-19 framework. The tiered system, which was originally announced on Nov. 3, outlines the criteria for when to impose stricter public health measures, including and closure of non-essential businesses. The five categories include prevent (green), protect (yellow), restrict (orange), control (red) and lockdown (grey).