Safety of JN.1-updated mRNA COVID-19 vaccines

JAMA Network Open

2025-07-28

(Press-News.org) About The Study: In this nationwide cohort study, no increased risk of 29 adverse events was observed after vaccination with the updated COVID-19 mRNA vaccine containing the SARS-CoV-2 Omicron JN.1 lineage in approximately 1 million adults.

Corresponding Author: To contact the corresponding author, Niklas Worm Andersson, MD, PhD, email nian@ssi.dk.

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

(doi:10.1001/jamanetworkopen.2025.23557)

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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[Press-News.org] Safety of JN.1-updated mRNA COVID-19 vaccines
JAMA Network Open

Safety of JN.1-updated mRNA COVID-19 vaccines

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