Introduction: COVID-19 vaccination has been carried out for the elderly, traders, vulnerable groups, and the government has also begun to accelerate vaccination for residents aged 18 years and over. Regarding this issue, we seek to assess college students' understanding of the knowledge about the vaccinations they will receive.Method: Survey on the level of knowledge, attitudes, practices, and concerns regarding vaccination was assisted by using the Knowledge, Attitude, Practices and Concerns (KAPC) questionnaire with a reliability value of Cronbach's Alpha coefficient of 0.86 which indicates that the questionnaire has good consistency and the validation of the questionnaire also shows good result. Respondents are non-medical students who live in Surabaya which are ≥ 18 years old and obtained by total sampling. Data analysis for the level of knowledge using the scale method, namely the Guttman scale. Meanwhile, the components of attitudes, practices, and concerns were measured using a Likert scale.Results: Sociodemographic data showed that the majority of respondents were 21 years old, amounting to 58.1%. Most respondents are female with a percentage of 67.6%. The results of the knowledge of non-medical students in Surabaya for the Covid-19 vaccination showed that 105 respondents had a level of 54.3%. Respondents' attitudes against COVID-19 vaccination are valued as much as 81.2%. The respondents' practice of COVID-19 vaccination is 78.8%. Meanwhile, the level of concern of respondents regarding the COVID-19 vaccination is 34.4%. Conclusion:Based on survey data as many as 105 respondents from non-medical students in Surabaya regarding the COVID-19 vaccination, it is known that the respondents' knowledge level is low, the respondent's attitude is very good, the respondent's practice level is good, and the respondent's level of concern about COVID-19 vaccination barriers is low.

Background: Leprosy is a chronic infectious disease caused by obligate intracellular Mycobacterium leprae, impacting public health. Leprosy causes deformity, and disability can lead to ulcer disease. Nerve involvement is essential in the emergence of ulcers on the feet, including in neuropathic ulcers. Neuropathic ulcers can be found on the soles of the feet and are often called plantar ulcers. The slow healing process of the ulcer will cause the plantar ulcer to become chronic. Purpose: To evaluate the characteristics of leprosy patients with and without plantar ulcers at the Leprosy Division of Dermatology and Venereology Outpatient Clinic of Dr. Soetomo General Academic Hospital, Surabaya, 2015-2019. Methods: A retrospective study were conducted by examining medical records for five years (2015-2019) at the Leprosy Division of Dermatology and Venereology Outpatient Clinic of Dr. Soetomo General Academic Hospital Surabaya. Results: A total of 511 patients met inclusion criteria. In leprosy patients without plantar ulcers group, the characteristics were male (68%), female (32%), aged 26-35 years (25.4%), paucibacillary (8.1%) and multibacillary (91.8%), patients without leprosy reactions (58%), and patients under treatment (49%). In leprosy patients with plantar ulcers group, the characteristics were male (64.3%), female (35.7%), aged 26-35 years (31%), multibacillary (92.9%), patients without leprosy reactions (61.9%), patients in the RFT category (76%), the ulcer duration group with highest prevalence rate 1-6 months (38.1%), and the most common location of plantar ulcers was on the forefoot (95.2%). Conclusion: Leprosy without plantar ulcers was more common than leprosy with plantar ulcers, mostly in male, dominated in the 26-35 years old for patients leprosy without plantar ulcers, type MB (multibacillary) was most history of leprosy type. Leprosy without reaction was common in leprosy patients with and without plantar ulcers. Patients without plantar ulcers majority was MDTL therapy, patients with plantar ulcers was common RFT (Release From Treatment).