 The COVID-19 pandemic has caused significant mental strain on healthcare workers due to high levels of stress and burnout. This study examined the prevalence and factors associated with burnout among healthcare workers during the first year of the pandemic. The results showed a wide range of reported burnout rates, 4.3% to 90.4%. Factors associated with increased or decreased burnout included age, gender, educational level, financial situation, family status, psychiatric disorders, stress, anxiety, depression, coping styles, social factors such as stigma, contact with patients with COVID-19, and having been infected with COVID-19. These findings can help inform policies and programs designed to reduce burnout among healthcare workers during the current and future pandemics. This article was authored by Agata Stodolska, Jaegorz Wojcik, Alona Baranska, and others.