I love how this has made everyone an epidemiologist - just a
link showing it was likely spreading back in August, which makes the spread far wider then previously thought. Add that with the large number of asymptomatic cases and the majority of people who do get sick presenting mild cases and you get where we are now.
Would have closing the borders earlier slowed the spread -
maybe? I doubt anyone will ever really know, and if they do they won't be posting about it here. Like everything in life it's just best guesses and hindsight in the end.