The Vaccine Handbook Now Available Through Healio Clinical Guidance

October 7, 2026

Empowering clinicians with trusted, evidence-based vaccine guidance wherever they practice

Thorofare, NJ — Healio announced today that The Vaccine Handbook: A Practical Guide for Clinicians by Gary S. Marshall, MD, and published by Professional Communications, Inc. (PCI), is now available digitally through Healio Clinical Guidance, giving healthcare professionals easier access to trusted, evidence-based vaccine recommendations and expert guidance.

Also known as “The Purple Book,” The Vaccine Handbook is a comprehensive resource featuring practical information on licensed vaccines in the United States, including vaccine science, policy, administration and guidance for addressing vaccine hesitancy.

Now available through Clinical Guidance, a point-of-care tool with modules on medical conditions to help clinicians treat patients using reliable information, the content can be easily searched, browsed and applied in practice from desktop or mobile devices.

“Healio and The Vaccine Handbook put reliable vaccine information directly in front of clinicians, helping them quickly access the evidence, recommendations and practical context they need to support informed conversations and decisions,” said Brien Cummings, Vice President of Clinical Guidance.

Key highlights of The Vaccine Handbook in Clinical Guidance include:
• information on vaccine infrastructure, policy and practice;
• practical guidance on immunization schedules, vaccine administration and special populations; and
• detailed coverage of vaccine-preventable diseases and corresponding vaccines.

By bringing The Vaccine Handbook into a modern digital experience, Healio is helping clinicians quickly find and apply reliable vaccine information wherever they practice.

“For over 2 decades, The Purple Book has been a trusted resource for front line vaccine providers, nurses, pharmacists and trainees. Now its vital content, as updated in the new 13th edition, has been taken from the bookshelf to the screen, with all the associated practical and functional benefits that the digital space has to offer. This couldn’t have come at a more important time, as clinicians struggle to counteract misinformation and keep their patients protected against vaccine-preventable diseases,” said Gary S. Marshall, MD, author of The Vaccine Handbook.

Access The Vaccine Handbook by author Gary S. Marshall, MD, through Healio Clinical Guidance at Healio.com/Vaccine-Handbook.

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About Healio
Healio is a multichannel information platform, providing healthcare specialists with tailored news, information and education across 20+ specialties in support of their daily practice of medicine. Healio offers its core News, CME, Clinical Guidance and Community channels, plus the all-new Healio AI tool providing evidence-based intelligence at the point of care. For more information, visit Healio.com/Vaccine-Handbook.