The Northwest Territories government says it plans to begin testing blood samples for the presence of antibodies that develop in response to COVID-19.
The territory says testing of discarded anonymous blood samples taken from April 1 onward will help it better understand how COVID-19 has affected residents.
The study will be able to differentiate between antibodies that developed due to vaccination or infection.
The territory stopped tracking COVID-19 infections among residents when it lifted all public health measures in April.
While it continues to document severe outcomes from COVID-19, that information is not readily available to the public.
The territorial government says there have been 35 hospitalizations, four intensive care unit admissions and four deaths related to COVID-19 between April and August.