Medical Letter (Med Ltr) is an open-access, peer-reviewed journal committed to the principles of transparency, accessibility, and ethical publishing in accordance with internationally recognized standards and best practices, including the guidelines of the Committee on Publication Ethics and the requirements commonly followed by major indexing databases.

Authors publishing in Medical Letter retain the copyright of their work. The journal does not require authors to transfer copyright ownership. Instead, authors grant the journal a non-exclusive license to publish, distribute, archive, and promote the article as the original publisher.

Open Access Policy

All articles published in Medical Letter are made freely and permanently available online immediately upon publication, ensuring unrestricted access to scientific knowledge for researchers, healthcare professionals, policymakers, and the general public worldwide.

Readers may read, download, copy, distribute, print, search, and link to the full text of published articles without financial, legal, or technical barriers, provided that proper attribution is given to the original authors and source.

Licensing

Articles published in Medical Letter are distributed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

Under this license, users are permitted to:

• Share and redistribute the material in any medium or format.
• Adapt, remix, transform, and build upon the material for any purpose, including commercial use.
• Reproduce and distribute the work without seeking prior permission.

The following conditions apply:

• Appropriate credit must be given to the author(s) and the journal.
• A link to the license must be provided.
• Any modifications made to the work must be clearly indicated.

Author Rights

Authors retain the right to:

• Maintain copyright ownership of their published work.
• Deposit the published version of the article in institutional repositories, personal websites, and academic networking platforms.
• Use the article in future books, lectures, educational materials, theses, dissertations, and other scholarly works with appropriate citation.
• Share and disseminate the article without restriction.

Ethical Standards

Medical Letter follows the ethical publishing principles and best-practice recommendations established by the Committee on Publication Ethics. Authors, editors, and reviewers are expected to adhere to the highest standards of research integrity, transparency, and publication ethics.

Third-Party Material

Authors are responsible for obtaining permission to reproduce any copyrighted material included in their manuscripts. Any third-party content not covered by the article's license must be clearly identified, and users must obtain permission from the respective copyright holders for reuse beyond permitted statutory exceptions.

Copyright Statement

Copyright © Authors. Published by Medical Letter (Med Ltr). Authors retain copyright and grant the journal a non-exclusive license to publish and disseminate the work. All articles are published under the Creative Commons Attribution 4.0 International (CC BY 4.0) License.

This policy aligns with modern open-access publishing practices and supports the transparency, accessibility, and ethical standards expected by international scholarly databases and organizations such as COPE.