The Delta variant has become a new foe in the fight against COVID-19. On this episode of This Is Why, we look at how the variant has changed the pandemic. Contact: Adam Toy - @Adam_Toy on Twitter Dave McIvor - @dmcivor770 on Twitter This is Why - @ThisIsWhy on Twitter Email us - thisiswhy@globalnews.ca Guests: Dr. Daniel Gregson, infectious diseases physician and a medical microbiologist and associate professor in the Cumming School of Medicine at the University of Calgary