What a 2nd lockdown could look like in New Brunswick Manitoba, which once had some of the lowest infection rates in the country, quickly became a cautionary tale as cases rose by several hundred each day by mid-November.Fisman said certain factors have been hallmarks of big waves in places that previously had a low case count, including the spread of COVID-19 in schools, meat-packing facilities, long-term care homes and among highly mobile young people.Dalhousie University immunology professor David Kelvin said reducing viral transmission among the young is key to controlling the virus, because cases in youth are often asymptomatic.Kelvin said in an email Thursday that strategies such as pop-up rapid testing may help identify hot spots.