Prioritising at-risk adults in vaccine coadministration trials.

Competing Interests: We used Grammarly to improve grammar and language. After using this tool, we reviewed and edited the content as needed, and we take full responsibility for the publication's content. We did not receive any funding to support this work. ZBH received research grants from Independent Research Fund Denmark (Inge Lehmanns grant number 3162-00031B), Helen Rudes Foundation, the Danish Cancer Society (Grant number KBVU-MS R327-A19137), and the Danish National Research Foundation (grant number DNRF170). ZBH is a member of the Danish Vaccination Council, outside of this work. OR reports grants or financial support from the Research Department of Nordsjællands Hospital, ECCMID-Global 2024, Research Foundation of Rigshospitalet, and the AP Moller Foundation, outside of the current work. CSE has unrelated ongoing research grants from the Swiss National Science Foundation, the Geneva Cancer League, and the Fondation Louis Jeantet, and reports unrelated former industry funding for an investigator-initiated study with Pfizer.