Scientists around the world are racing to develop a vaccine for COVID-19. But experts have said it could take a year to 18 months for one to hit the market. The process for testing and approving a vaccine is long and complicated. That can be frustrating when the coronavirus is taking more and more lives every day. But cutting corners to push a vaccine through faster can lead to devastating consequences. We know that, because it’s happened before.See omnystudio.com/listener for privacy information.