Authored by: Sicheng Chen Art by: Vanessa Chen Hsieh Although the COVID-19 pandemic has subsided, many people still have lingering questions about the mRNA-based COVID-19 vaccines: How do they confer immunity? Where do they go once inside our bodies?  While the first question has been widely discussed, the second is often overlooked. For many, it remains unclear how the mRNA is packaged and delivered—a process that lies at the heart of how these vaccines work. Understanding the answer to this...