The latest report on Canada's flu vaccine shows the shot is less than 20 per cent effective against the most common strain.. Some public health officials are questioning the focus on a seasonal flu vaccine that delivers unreliable results. We speak to Dr. Danuta Scowronski, the lead for influenza at the BC Centre for Disease Control, who says it's time for a moon shot for the flu shot. Dr. Theresa Tam, Canada's Chief Public Health Officer responds. Matthew Miller, an assistant professor at McMaster University in Hamilton, ON talks about Canada's role in developing a universal flu vaccine.