Background: Hepatitis B virus (HBV) infection remains a significant occupational health concern for healthcare workers (HCWs), including trainees exposed to biological risks. Although vaccination is the most effective preventive measure, the persistence of immunity over time and the need for booster doses remain subjects of debate. Objective: The present study aims to assess the prevalence of protective anti-HB antibody titers among healthcare trainees at the “SS Annunziata” Hospital in Chieti, comparing those vaccinated in infancy with those vaccinated during adolescence. Methods: A retrospective observational study was conducted on 2028 healthcare trainees from 2021 to 2024. Participants were divided into two groups based on vaccination timing: infancy (PED group) and adolescence (ADO group). Serological tests were performed to measure anti-HB titers, with a protective threshold set at ≥10 IU/L. Statistical analyses were conducted to evaluate differences in immunity persistence between the two groups. The results showed that the overall prevalence of protective anti-HB titers was 50.7%, with significant differences between the PED and ADO groups. Protective immunity was observed in 79.2% of individuals vaccinated during adolescence, compared to 44.6% of those vaccinated in infancy (p < 0.001). No significant differences in antibody persistence were found between males and females. Notably, 92.4% of participants with non-protective titers received a booster dose within two months of testing. Conclusions: The study confirms a significant decline in anti-HB titers over time among individuals vaccinated in infancy, suggesting a potential need for booster doses later in adulthood. The high adherence to vaccination recommendations among healthcare trainees is a promising finding, reinforcing the importance of continuous education and immunization programmes in healthcare settings. Further research, including longitudinal studies and additional HBV biomarkers, is necessary to optimize vaccination strategies and long-term immunity monitoring in HCWs.

Background: Work engagement is defined as a positive and fulfilling work-related state of mind, characterized by vigor, dedication, and absorption. High levels of engagement are associated with improved organizational functioning and a stronger sense of belonging among employees. Objective: This study, conducted in collaboration with a large metalworking company in central Italy, aimed to explore the relationship between work engagement and organizational cynicism among Maintenance Team Leaders. Specifically, the goals were to assess the levels of engagement and emotional involvement and to examine how these dimensions vary according to socio-demographic factors such as gender, age, educational background, and seniority. The ultimate aim was to support occupational physicians and workplace safety officers in identifying the best practices for preventing psychosocial risks, work-related stress, and burnout. Methods: A total of 99 Maintenance Leaders participated in the study. The Italian version of the Utrecht Work Engagement Scale (UWES) was used to assess the three core dimensions of engagement: vigor, dedication, and absorption. Additionally, the Cynicism scale development by Naus, Van Iterson, and Roe was administered. Results: While the sample size limits generalizability, the findings offer preliminary insight into engagement levels within this population. The results emphasize the need to expand the sample and to conduct comparative analyses across different teams within the company better understand engagement patterns and inform targeted interventions. Conclusions: Although work engagement has been extensively studied in the healthcare sector, especially during the COVID-19 pandemic, limited research has addressed its role in the industrial context, and even less within the metalworking sector. This study contributes to filling that gap by providing an initial profile of engagement among maintenance leaders and by highlighting the interplay between engagement, cynicism, and individual characteristics in a high-demand industrial environment.