Canada's chief public health officer says as long as Omicron is the dominant variant circulating in Canada, we're unlikely to see another big wave of COVID-19 infections. Dr. Theresa Tam also described her own decision-making process when it comes to wearing a mask, saying she takes into account the place she's visiting, what she's doing, her personal medical conditions, who she's visiting and the fact that she's been vaccinated and boosted.