In a multistate network that enrolled adults hospitalized during March-July 2021, effectiveness of 2 doses of mRNA vaccine against COVID-19-associated hospitalization was sustained over a follow-up period of 24 weeks (approximately 6 months). These findings of sustained VE were consistent among subgroups at highest risk for severe outcomes from COVID-19, including older adults, adults with three or more chronic medical conditions, and those with immunocompromising conditions. Overall VE in adults with immunocompromising conditions was lower than that in those without immunocompromising conditions but was sustained over time in both populations.
ASJC Scopus subject areas
- Health(social science)
- Health Information Management
- Health, Toxicology and Mutagenesis