Introduction Coronavirus Disease (COVID-19) caused by Novel Coronavirus named as Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) was declared Pandemic by The World Health Organization (WHO) and a Public Health Emergency of International Concern (PHEIC) on January 30, 2020. Many COVID-19 vaccines have been developed, including CoronaVac vaccines by Sinovac. Health care workers, along with medical clerkship students are the priority to receive the vaccine. However, the Adverse Events Following Immunization (AEFI) of the CoronaVac remains unclear. This study aims to describe and analyze the adverse events following immunization (AEFI) of COVID-19 vaccination in medical students in clerkship programs. Method We conducted a cross-sectional study using a questionnaire to assess AEFI after CoronaVac vaccination among medical clerkship students. A Chi-Square test with 95 % of CI was used to determine whether gender correlated with symptoms of AEFI. Result We identified 144 medical clerkship students. The most common AEFI of SARS-CoV-2 vaccinations was localized pain in the injection site during the first dose with 25 (45 %) reports and the booster dose with 34 (67 %) reports. Then followed by malaise, the first dose with 20 (36 %) reports and the booster dose with 21 (41 %) reports. Other symptoms like headache, fever, shivering, sleepiness, nausea, dysphagia, and cold were also reported. Conclusions CoronaVac SARS-COV-2 vaccine has several mild symptoms of AEFI and not correlated with gender. Nevertheless, follow-up after vaccination is needed to prevent immunologic responses that may occur in some patients.

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Vaccination is one of the recommended way to eradicate Covid-19 pandemic. Unfortunately, there are still many people who refuse to get vaccinated. One of the causes is anxiety about the side effects that occur after vaccination. With this misinformation about vaccines, public anxiety is getting higher, so that more and more people are hesitant to get vaccinated. The purpose of this study was to determine the level of anxiety related to vaccines in medical students who have more knowledge about vaccines than the general public society. The anxiety assessment method used was the Hamilton Rating Scale for Anxiety (HARS) questionnaire. There were 108 medical clerkship students in this study, consisting of 25 male respondents and 83 female respondents, aged between 21-27 years. Based on the HARS-score obtained, it showed that all respondents were in the low or minimal anxiety range. Aspects of anxiety predominately appeared in the pre-vaccination phase. The differences between men and women were influenced by hormonal fluctuations and conditions before vaccination, such as stress, workload, knowledge capacity, and information obtained related to vaccination. Keywords: Anxiety, Covid-19, HARS-score, ISRR, Vaccines

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