A vaccine for the coronavirus is being held out as the thing that's going to get the world back on track. In this episode of Squiz Shortcuts we look at what a vaccine is, how it's developed, and the challenges public health officials are facing with finding one for COVID-19. Squiz Recommends: Squiz Shortcuts - Infectious Diseases NYT The Daily - The Vaccine Trust Problem See /privacy for privacy and opt-out information.