if the samples are from may and june, i would expect very low transmission rates just about everywhere outside of toronto and montreal. so, when you take data over a wide area and are only concerned about a very small area, what you do is water down the data.

so, if you get 10% in toronto and .01% west of sudbury, that balances out to 1% overall - while distorting the actual findings. and, i suspect that's what you're seeing here.

so to be clear: as canada was last in, it will be last out and i would not expect to see high levels of antibodies in the canadian population in the may-june period, even in the quebec-windsor corridor. if they had found higher prevalence, overall, that would indicate much earlier spread than previously thought. but, the numbers are smoothing out regional hot spots, blurring the reporting accuracy. and, eight-ten week old data in a pandemic is of minimal use in understanding where those numbers are today.

it's like they got in right before it happened.

we're going to find out if toronto got over that 20% hump or not soon enough. and, i think it's clear enough that montreal probably did.

https://montrealgazette.com/news/early-antibody-tests-suggest-few-canadians-had-covid-19