More young people are getting COVID-19. How worried should I be?

As many experts feared, the number of COVID-19 cases is rising after flattening out during the summer. The biggest climb is among people under 40, especially adults who are 20-29 years old. The reasons this is happening are more complex than you might think. Infectious disease epidemiologist Ashleigh Tuite explains why and delves into what this means for all of us, no matter what our age.