This is just astonishing. What accounts for this huge difference? Spring break in California vs Florida/New York? (If so, what do we make of the fact that Seattle, recently a COVID-19 hotspot, is just 3h from Vancouver?) https://twitter.com/j_mcelroy/status/1246842586989387776

So the most likely answer is "snowbirds", ie, there but for the grace of God BC happens to be at one end of the country and Ontario and Quebec on the other.

Average doubling times over the last ten days:

Ontario - 4.81 days
Quebec - 4.75 days
BC - 13.68 days