Cell host & microbe
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The viruses causing the SARS outbreak of 2002-2003 and current COVID-19 pandemic are related betacoronaviruses. What insights were learned from SARS that can inform SARS-CoV-2 vaccine development? Focusing on important lessons from SARS vaccine development and two SARS vaccines evaluated in humans may guide SARS-CoV-2 vaccine design, testing, and implementation.