Vaccine studies show 55% effectiveness against hospitalizations. Natalie Dean, an American biostatistician and UF biostatistics assistant professor, specializes in epidemiological modeling.
A JAMA Network Open study finds the vaccine reduces COVID-19-related hospitalizations by about 55% and lowers visits to emergency departments by 50%. The paper has drawn attention because of past political interference in CDC publishing decisions. The study uses a test-negative design and is part of ongoing assessments of vaccine performance amid evolving viral strains.