That's possible. I first saw a mention of an outbreak in China of a new "flu" type illness in Dec 2019. There was a small story about a new virus showing up in a market in Wuhan in http://outbreaknewstoday.com/.

My wife and I started paying attention to what was happening in China in January, although we didn’t get seriously worried until they started taking temperature readings of travelers from China at SFO airport in late January 2020.

For us, that was the tripwire indicating Covid-19 was SERIOUS and we started preparing.

So, by January it was starting to spread globally. There's an international Airport in Halifax, right?

So, it's possible it started spreading in Nova Scotia in early 2020.