Estimated COVID-19 mRNA vaccine effectiveness, illness severity during Omicron BA.4 and BA.5 periods

JAMA Network Open

2023-03-15

(Press-News.org) About The Study: In this case-control study of COVID-19 vaccines and illness, vaccine effectiveness associated with protection against medically attended COVID-19 illness was lower with increasing time since last dose; estimated vaccine effectiveness was higher after receipt of one or two booster doses compared with a primary series alone.

Authors: Ruth Link-Gelles, Ph.D., M.P.H., of the Centers for Disease Control and Prevention COVID-19 Response Team in Atlanta, is the corresponding author.

To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/

(doi:10.1001/jamanetworkopen.2023.2598)

Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

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About JAMA Network Open: JAMA Network Open is an online-only open access general medical journal from the JAMA Network. On weekdays, the journal publishes peer-reviewed clinical research and commentary in more than 40 medical and health subject areas. Every article is free online from the day of publication.

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Estimated COVID-19 mRNA vaccine effectiveness, illness severity during Omicron BA.4 and BA.5 periods

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