It may seem like Canada's hardest-hit provinces have gone to the nth degree on COVID-19 interventions for a second time around, but experts say they can still go further. 

A return to normal life without masks, restrictions and lockdowns could take months, experts caution, as Canada officially approves Pfizer’s COVID-19 vaccine.

The blues-inspired track was written by Morrison in support of his Save Live Music campaign, and the song is performed by Clapton.

Many scientists expect the biggest annual fall in carbon emissions in generations this year as a result of coronavirus measures globally.

The measures include limits on free movement and the closure of many stores, shopping malls and hotels, which will remain in place until at least Nov 3.

The concept of containing hot spots isn't new, but it's being tested under new pressures as authorities try to avoid a resurgence, this time with weakened economies.

'This is par for the course when it comes to this disease and public communication,' said one Canadian expert.

Like many things coronavirus-related, the chance Canada will need to tighten restrictions again is hard to predict, according to disease experts.