Firefighters

The goal of this clinical trial is to evaluate the impact of short documentary-style videos to educate and inspire firefighters to take safety measures to prevent cancer incidence and mortality. The main question it aims to answer is: Will firefighters will have a higher perceived susceptibility to cancer, lower perceived barriers to cancer risk reduction practices, and higher perceived self-efficacy and benefit to risk reduction practices after watching the videos? Participants will: * Take a Pre-Intervention survey * Watch one of five randomly assigned 5 minute video interventions * Take a Post-Intervention survey

The aim of the study is to describe professional exposures and health events among French military firefighters (both active-duty personnel and veterans) and identify potential relationships between the exposome (the total history of occupational and personal exposures) and health status in these populations. The study is based on a self-administered questionnaire that collects retrospective and present information about exposures and health conditions.

The goal of this clinical trial is to test how best to implement a mobile peer support app called PeerOnCall in Canadian fire services. The main questions it aims to answer are: 1. Do firefighters use the app more with a structured implementation compared to standard implementation? 2. Does using the app improve mental health and workplace outcomes? Researchers will compare a standard implementation approach with basic onboarding to more structured implementation with weekly reminders, new content, and feedback reports to see if these features encourage more consistent app use. Participants will: 1. Use the PeerOnCall app to access private peer support and wellness resources. 2. Participate in surveys, interviews, and focus groups about their app experience and workplace environment.