Adverse Events Following Immunization Report and Vaccine Effectiveness of Sinovac. An Interim Report

Vaccination is a prevention of transmission and spread and in order to establish herd immunity against the Covid�19 pandemic. Indonesia chose the Sinovac vaccine, which uses weakened viruses. The objective of the study was to measure the Adverse Events Following Immunization (AEFI) 24-72 hours post-vaccination and its effect at three months after vaccination. An online survey was distributed to 1574 subjects who received the first dose, and 530 respondents (response rate 33.6%) who answered the questionnaire were sent the form again for the second dose, and 249 subjects responded (response rate 46.9%). From the first dose: 322 female (60.9%), 207 male (39.1%). There were 22 respondents who had fever on the first day and only five respondents on the second day. In addition, 147 (27.8%) felt pain in the injection site, nausea 30 respondents (5.7%), vomiting six persons, bloating 35 respondents (6.6%), and diarrhea ten respondents (1.9%). Fifty-nine respondents who got mild adverse events did nothing to ease their adverse events, 18 respondents took self-medication, 15 respondents consulted the doctors in the vaccination site. Only one respondent went to the nearby hospital for further therapy. Results from the second dose: As many 249 respondents (131 female, 108 male) answered respondents. The AEFI’s pattern was quite the same as the first dose. Keywords: AEFI, Sinovac, Covid-1