Ammon News - With COVID-19 cases rising in multiple provinces in Canada after a summer lull, doctors said that the country has entered a fourth wave of the pandemic.

Internal medicine physician at St. Michael’s Hospital in Toronto, Dr. Fahad Razak, told the CTV News Channel Wednesday that Canada is now in a fourth wave.

"From mid-July to mid-Aug, there’s been a four-fold increase (in cases)," he added, warning "a wave can happen very, very quickly" with the more infectious Delta variant of the virus.

"You can have really explosive growth," he further said, adding that that’s what’s playing out in United States, the United Kingdom and the Netherlands right now.

Scientific director of the Ontario COVID-19 Science Advisory Table, Dr. Peter Juni, also warned Canada is in a fourth wave, noting that unvaccinated people have made up 90 per cent of all COVID-19 cases, since the vaccine rollout began in December.

The country's seven-day average for new daily cases is now close to 1,300, an increase of nearly 60 per cent over the previous week, he pointed out.

Juni urged those still on the fence to get their shot, as they’re the most likely to be hospitalized with serious illness.