As the Pfizer-BioNTech vaccine rolls out across the country, and other vaccines await imminent regulatory approval, many public health experts are focusing on the issue of vaccine hesitancy.

Canada's Chief Public Health Officer Dr. Theresa Tam has spoken out about the "moveable middle" and says it is critical that as many people get vaccinated as possible to protect themselves and others from risk.

But, since conversations about vaccines can be hard, today we're bringing in an expert to explain how to have more meaningful and productive discussions with people who have questions or fears. Maria Sundaram is an infectious disease epidemiologist who studies vaccines.