The aim of this study was to investigate the attitudes of the students of Medical Sciences and Technical Sciences Universities toward HIV/AIDS. This cross-sectional study was performed on 950 first-year Medical Sciences students and first-year Technical Sciences students between May 2017 and June 2018 in Tehran, Iran. The students were selected using the census-sampling method to fill out the International AIDS Questionnaire-Persian version (IAQ-P). SPSS version 21 was used to analyze data by the chi-square test and nonparametric tests. There was a significant difference in the mean score of AIDS attitude between the two groups (P < 0.001). Confounding factors including age, gender, and marital status had a significant effect on students' AIDS attitude between the different groups using regression models (P < 0.001). There is an increasing trend in sexual activity among students and young people while it is not true about its attitude and awareness. Therefore, we need to improve attitude toward AIDS in developing countries.

Background: Mental health is a significant problem in developed and developing countries which influences all aspects of life. We aimed to evaluate the status of Iranian students' mental health. Methods: This cross-sectional study was performed on 2052 elementary school students located in Tehran, Iran, in September 2018. We used the Census sampling method for sampling and the general health questionnaire comprising 28 items. For statistical analysis SPSS software, version 21 was used. Results: A total of 2052 elementary school students (1373 girls and 679 boys) participated in this study. The mean ± standard deviation (SD) ages of the girls and boys were 14.1±1.7 and 13.9±1.1 years, respectively. The mean ± SD of anxiety, social dysfunction, and depression scores were 7.42±4.92, 7.35±3.33, 6.83±2.26 in the girls and 5.65±3.89, 6.30±3.09, 4.61±1.74 in the boys, respectively. The mean ± SD total scores in boys and girls were 20.48±12.31 and 27.90±14.66, respectively. Conclusion:The mental health status of elementary school students was generally low, especially in male students.