Dr. Drew Weissman and Dr. Katalin Kariko smile while standing together
Meet Penn Medicine’s mRNA Vaccine Pioneers

Who knew a chance encounter could eventually save countless lives? Dr. Katalin Karikó and Dr. Drew Weissman met while arguing over whose turn it was to use a copy machine. That meeting ignited a decades-long collaboration that led to the mRNA technology used in COVID-19 vaccines protecting millions of people across the globe.

Learn more about Drs. Karikó and Weissman and their lifesaving science