“…Insomnia, characterized by dissatisfaction with sleep quantity or quality, 1 is a common sleep disorder. 2 Several factors, such as mental disorders, [3][4][5] emotional stress, 6,7 and working at night or in shifts, 8 are closely associated with insomnia. During the coronavirus disease 2019 (COVID-19) pandemic, health-care workers are confronted with the stress of high infection risk, heavy workload, long shift hours, and limited contact with their families, which can result in mental health issues, including stress, anxiety, depression, and insomnia.…”