Moderna, Inc. is a clinical-stage pharmaceutical company, primarily focused on discovering and developing messenger RNA (mRNA) based therapies. The company's mRNA based COVID-19 vaccine, Spikevax (mRNA-1273), is approved for use in adults in the United States. The vaccine is also authorized for emergency use in several countries as COVID-19 vaccine. The company has also developed booster doses of its COVID-19 vaccine and is developing variant-specific booster candidates.