The Joint Committee on Vaccination and Immunisation (JCVI) has recently recommended the introduction of the varicella (chickenpox) vaccine into the UK’s routine childhood immunisation schedule. This was previously only available to a small group of eligible children or through private healthcare providers. Engaging families in conversations around vaccines is recognised as important for informed decision-making, and professionals leading these discussions need to be confident and well-informed. This article aims to provide an overview of the evidence behind the decision to introduce varicella (chickenpox) vaccine, and addresses anticipated questions.