If the intention is to vaccinate the highest risk neighbourhoods first, then there is a need for more real-time, dynamic prioritization. This requires some understanding of a neighbourhood’s propensity for COVID infections (based on cumulative cases per capita), as well the degree of protection it has from the virus (percent of residents vaccinated). Scatterplots are included. The best use of an incremental dose of available vaccine is in moving postal codes in the upper left to the right as quickly as possible. That will avoid the most infections, hospitalizations, and deaths. As new data are released by ICES each week, the blog will be updated to help track these moving targets.