Dynamics of Absences Due to Respiratory Infections, Including COVID-19, Among Medical Staff in a Regional Pediatric Hospital

<b>Background</b>: Respiratory infections pose a significant public health challenge, particularly among healthcare workers (HCWs). The COVID-19 pandemic exacerbated absenteeism due to respiratory illnesses, affecting healthcare workforce stability. Identifying factors influencing absenteeism is crucial for workforce resilience and effective care. <b>Methods</b>: This retrospective longitudinal study analyzed HCW absenteeism due to respiratory diseases from 2017 to 2023 at the "Sf. Maria" Children's Emergency Hospital in Iași, Romania. Data from 3827 HCWs were examined, including demographic and occupational variables (age, gender, job role) and disease types. Statistical analyses (chi-square tests, ANOVA, and regression models) were conducted using SPSS to assess absenteeism trends and associated risk factors. <b>Results</b>: Sick leave peaked in 2020 (8322 days) and remained high in 2021 (8134 days), gradually decreasing in 2022-2023 but not returning to pre-pandemic levels (~5000 days/year). Nurses accounted for most leave days, while male staff and HCWs aged 41-50 were most affected. Seasonal variations showed higher absenteeism in transitional months and lower rates in summer. COVID-19 was the leading cause of absenteeism during the pandemic, with quarantine measures further increasing sick leave duration. <b>Conclusions</b>: Pediatric hospitals must strengthen infection control measures to protect HCWs and sustain care continuity. Preventive actions such as immunization, staff training, and health monitoring are critical in reducing absenteeism, maintaining a resilient workforce, and ensuring quality care during health crises.