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Article
Immunology
Protection by Vaccines and Previous Infection Against the Omicron Variant of Severe Acute Respiratory Syndrome Coronavirus 2
Martin Smid et al.
Summary: The effectiveness of vaccines and post-infection immunity against the Omicron variant is lower than against the Delta variant. Recent vaccination still brings substantial protection against severe outcomes for the Omicron variant.
JOURNAL OF INFECTIOUS DISEASES (2022)
Letter
Immunology
More Analyses are Needed to Evaluate the Effectiveness of Protection by Vaccines and Previous Infection Against the Omicron Variant of SARS-CoV-2
Ondrej Vencalek et al.
JOURNAL OF INFECTIOUS DISEASES (2022)
Article
Medicine, General & Internal
Effectiveness of mRNA BNT162b2 COVID-19 vaccine up to 6 months in a large integrated health system in the USA: a retrospective cohort study
Sara Y. Tartof et al.
Summary: This study aimed to assess the overall and variant-specific effectiveness of the BNT162b2 vaccine against SARS-CoV-2 infections and COVID-19-related hospital admissions among members of a healthcare system in California. The effectiveness of the vaccine remained high against hospital admissions even up to 6 months after full vaccination, despite a decline in effectiveness against SARS-CoV-2 infections over time, which was likely due to waning immunity rather than the delta variant escaping vaccine protection.
LANCET (2021)
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