Background: The coronavirus disease (COVID-19) pandemic is an international public health threat. This study aimed to evaluate COVID-19-related knowledge, preventive behaviors, and risk perception among Saudi Arabian medical students and interns. Materials and Methods: This cross-sectional study was conducted among fourth- and fifth-year medical students and interns between June and August 2020 at three colleges of medicine in Qassim Region, Saudi Arabia. A previously validated questionnaire was distributed as an online survey. Results: The total mean knowledge score was 12.5/15 points; 83.9% achieved a high score. The mean score of self-reported preventive behavior was 8.40; 94.1% achieved a high score. The overall mean risk perception score was 5.34/8 points; 31.6% achieved a high score. Conclusion: Medical students assessed in this study displayed sufficient knowledge and preventive behaviors regarding the COVID-19 pandemic and an average level of risk perception. Lower scores by younger medical students suggest that they must improve their COVID-19 knowledge and risk perception, as they are a potential source of health information in their communities.

Context: Diabetes-related retinopathy (DR), the most common complication of diabetes mellitus (DM), is a severe and preventable cause of visual loss and blindness that has been reported to be the fourth leading cause of blindness among four million cases globally. Aims: This study aimed to evaluate the knowledge, attitudes, and practices of fourth- and fifth-year medical students concerning patients with DR. Methods and Materials: This cross-sectional descriptive study was conducted at a College of Medicine in Saudi Arabia, in November 2018, and comprised 153 fourth- and fifth-year medical students of both sexes. Participants were required to complete a previously validated hard copy questionnaire. Results: In total, > 50% of participants showed good knowledge of DR (poor participant knowledge, n = 65, 42.5%). We found 16 (10.5%) participants had poor attitudes to DR compared to 137 (89.5%) of participants with good attitudes, and 32 (20.9%) participants showed poor practices compared to 121 (79.1%) participants showing good practices. There was a statistically significant difference between the sexes and the level of practice (P = 0.021). Conclusions: More than 50% of participants in our study showed good knowledge concerning DR, with excellent attitudes and practices. Moreover, participants' age was identified as a significant factor affecting practice regarding DR. More targeted education is required to improve their knowledge base in regard to DR. Medical faculties have a significant role in the education of medical students to ensure greater awareness of DR.