Explore the challenges and complexities of developing a coronavirus vaccine in this TED Connects virtual conversation featuring epidemiologist Seth Berkley, head of Gavi, the Vaccine Alliance. Gain insights into the vaccine development process, timeline expectations, and the importance of global collaboration. Learn about the paradox of vaccines, the risks of herd immunity, and the concept of vaccines as a global public good. Discover the potential costs, distribution challenges, and the need for a global perspective in vaccine allocation. Understand the role of testing, masks, and other interventions in combating the pandemic. Hear expert opinions on best-case scenarios, expectations for different regions, and how citizens can contribute to the effort. Delve into the future of pandemic preparedness and the steps needed to move forward in the fight against COVID-19.