Objective: In this study, it is aimed to determine the psychological reactions of pre-clinical medical school students to the COVID-19 pandemic and their views on online learning.
 Methods: A cross-sectional study was conducted on 722 medical students. Data were collected with an online questionnaire between 20 and 27 December 2020. A data collection form including questions about sociodemographic characteristics, opinions about online learning, the Impact of Event Scale-Revised, and the Insomnia Severity Index scales was used.
 Results: The mean age of the participants was found to be 20.7±1.6 years. 393 (54.4%) of them were women. 671 (92.9%) of the students stated that they were concerned about the disruption of their education due to the pandemic, and 76.3% (n=551) preferred the face-to-face education environment in their schools to the online learning environment. Of the students, 181 (25.1%) had symptoms of post-traumatic stress disorder (PTSD) and 171 (23.6%) had symptoms of insomnia. The probability of posttraumatic stress disorder was higher in women than in men (OR=1.489, 95% CI=1.02-2.16; p=0.038). In those who have relatives who have contracted COVID-19, compared to those who have not (OR=1.489.95% CI=1.02-2.16; p=0.038), and those with an increased fear of COVID-19 transmission to their relatives were less likely to have PTSD symptoms than those with or without (OR=0.523, 95% CI=0.339-0.807; p=0.003). In addition, those who followed the news about COVID-19 from social media were more likely to have symptoms of PTSD in October than those who followed it from other sources (OR=0.662, 95% CI=0.461-0.951; p