Overview We are providing an even more granular analysis of years 2015 through 2022, using data from Ontario Health Insurance Plan (OHIP). This OHIP dataset includes about six million unique patients. Importantly, it contains four years of 'baseline' data from before COVID-19 or COVID-19 vaccines appeared in Canada, as well as data from the 2020, when only COVID-19 the disease was present, and the 'COVID vaccine years' of 2021 and 2022. This gives us a window into the health changes Ontarians experienced following the introduction COVID vaccines, of which