The Phases of Developing a Vaccine

How much longer should we expect to wait before a vaccine is available? This is a question many have been asking throughout the COVID-19 pandemic. Potential vaccines must undergo certain processes prior to their release for use. These processes include clinical trials comprising 4 phases that can take months, and in some cases even years to complete. Dr. David Hussong breaks down each phase of the process, and gives insight to when we can expect a COVID-19 vaccine to be made available.