# Effectiveness of BNT162b2 and ChAdOx1 nCoV-19 COVID-19 vaccination at preventing hospitalisations in people aged at least 80 years: a test-negative, case-control study

> Research article (The Lancet Infectious Diseases, 2021) · cited 149× · AI/ML

**Wikidata**: [openalex:W3176340533](https://www.wikidata.org/wiki/openalex:W3176340533)  
**Source**: https://4ort.xyz/entity/effectiveness-of-bnt162b2-and-chadox1-ncov-19-covid-19-vaccination-at-preventing-hospitalisations-in-people-aged-at-leas