The coronavirus disease 2019 (COVID-19), which begun on December 19 in Wuhan, China spread rapidly around the world (
1,
2). The widespread transmission of this disease in the world caused the World Health Organization (WHO) to introduce it as a pandemic and an emergency situation for countries (
3,
4). The pandemic not only created fear of disease and death among different people in the society, but also brought double and unbearable psychological pressure to people worldwide. The widespread prevalence of the disease, launching quarantine programs, and delay in reopening of schools and universities negatively affected the mental health of students (
5,
6). Since the COVID-19 pandemic has led to fear in different social groups, timely understanding of the mental state of the people is essential (
7,
8). Previous studies have shown that the prevalence of COVID-19 has had devastating psychological effects on individuals due to fear of getting sick, fear of dying, and loneliness (
9). According to the evidence, similar pandemics have negatively affected the community mental health. Meanwhile, medical students and clinicians, who are directly involved in caring for patients with COVID-19, are at high risk for developing mental disorders (
10,
11). Due to the large number of patients with COVID-19 around the world, many countries have asked interns, and even professors and residents, to join the workforce and treat the patients. However, the lack of sufficient experience and knowledge in medical students in such critical situations can be very stressful (
12,
13). A study in China found that 27% of medical students who lacked sufficient experience in dealing with such crises and entered the medical environment as workforce experienced psychological distress, and 11% suffered from mental disorders such as post-traumatic stress disorder (PTSD) (
14). So far, several studies have been conducted on the effect of COVID-19 on the mental health of medical staff, children, adults, and the general population (
14-
16), but few studies have been conducted on medical students and professors, especially in Iran.