Influenza (Flu) and COVID-19 are both contagious respiratory illnesses, but they are caused by different viruses. COVID-19 is caused by infection with a new coronavirus (called SARS-CoV-2) and flu is caused by infection with influenza viruses. Then there is a third culprit-cold. What are the differences and similarities? Harjinder Thind chats with Dr. Harman Sekhon to talk about these three.