The article highlights the challenges in ending Ontario’s measles outbreak, which has more cases than the entire U.S. combined. The resurgence of this disease, eliminated decades ago, is a concern as infections rise in Alberta and Manitoba. CBC’s Jennifer Yoon delves into the reasons behind the outbreak and explains why containing it is proving to be a significant challenge for frontline workers. The situation underscores the importance of public health efforts to control and prevent the spread of infectious diseases like measles, emphasizing the need for vaccination and vigilance in managing outbreaks effectively. As health authorities work to address the outbreak, the article sheds light on the complexities and obstacles faced in combating a disease that was once considered eradicated.