As temperatures drop and gatherings move indoors, respiratory virus activity is once again on the rise in Ontario. The latest report from Public Health Ontario (PHO) reveals a concerning upward trend for respiratory viruses, including COVID-19, influenza, and respiratory syncytial virus (RSV), which are all expected to see increased activity in the coming weeks. Both children and adults under 65 years old face a heightened risk of severe illness, making awareness and prevention more critical than ever.