COVID-19 has already produced catastrophic social, economic, and public health consequences, with more than 107 million documented cases and 2.3 million deaths. Although this pandemic is far from over, we now have the tools to end it, with the largest and most rapid global deployment of vaccines under way. That we got this far so quickly is remarkable, but next time we might not be so lucky. More virulent and deadly coronaviruses are waiting in the wings. Thus, the world needs a universal coronavirus vaccine.