COVID-19 vaccines are highly effective in preventing hospitalizations, emergency visits

https://www.eurekalert.org/news-releases/927960

 

News Release 9-Sep-2021
Peer-Reviewed Publication
Regenstrief Institute

A study published in the New England Journal of Medicine involving data from nearly 200 hospitals around the United States shows that 2-dose COVID-19 vaccinations are highly effective at preventing hospitalizations, emergency department visits, and intensive care admissions due to the virus. The real-world evidence gathered from electronic health records (EHRs) demonstrates that the vaccines provide high levels of protection for populations disproportionately affected by the virus, including older adults and minorities.
Regenstrief Institute

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Data analysis showed 2-dose mRNA vaccination (Moderna and Pfizer) was:

    89 percent effective at preventing COVID-19 hospitalizations
    91 percent effective at preventing COVID-19 emergency department or urgent care visits

    90 percent effective at preventing COVID-19 intensive care unit admission

The effectiveness was significantly lower in individuals who received only the first dose of the two shot-vaccination.

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This study was also one of the first to look at the effectiveness of the single-dose Johnson and Johnson vaccine. It was found to be 73 percent effective against emergency department and urgent care visits, and 68 percent against hospitalizations. However, the authors note the smaller sample size may affect the precision of these estimates and state that more data is needed.

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