How vaccines are made and why we can’t just make them faster

The two first coronavirus vaccines, the ones made by Pfizer and Moderna have been out for months now. But the process of making them, shipping them, and getting them to people has been much choppier than most of us hoped. So how exactly are these vaccines made? We definitely need more vaccine than is out there right now, so why we can't just make them faster? Dr. Jason Diaz, Assistant Professor in the Integrated Science, Business, and Technology program at La Salle University joins KYW Newsradio In Depth to break down what goes into making a vaccine and why it seems like there's never enough.