(Trevor Pritchard/CBC - image credit)Public health experts urge residents to stay vigilant and get vaccinated as flu season arrives amid rising COVID-19 numbers in the Ottawa area. "We're entering those weeks where things are the diciest," said Raywat Deonandan, an epidemiologist at the University of Ottawa, on CBC Radio's All In A Day. The colder weather brings the triple threat of higher COVID-19, influenza and RSV transmission, as residents learned last fall. Ottawa Public Health (OPH) data suggests COVID-19 activity increased last week, compared to the week before. That surge overwhelmed hospitals during last year's cold and flu season, which Roumeliotis said is not happening so far in 2023.