Pemberian ASI eksklusif pada bayi telah dianjurkan oleh semua pihak. ASI tidak hanya dapat memenuhi kebutuhan energi bayi, tetapi juga memberikan makronutrien dan mikronutrien yang penting untuk tumbuh kembang bayi. Walaupun demikian, cakupan pemberian ASI eksklusif belum dapat dikatakan optimal. Hal tersebut dipengaruhi oleh kurangnya pengetahuan ibu mengenai kandungan nutrisi ASI dan faktor ibu yang bekerja. Pengabdian masyarakat ini bertujuan untuk memberikan edukasi kepada ibu menyusui mengenai kandungan ASI dan pemberian ASI perah (ASIP). Kegiatan dilakukan secara online melalui Zoom. Kegiatan berupa seminar atau penyuluhan dengan menghadirkan 3 topik dan 3 narasumber. Evaluasi keberhasilan kegiatan dilakukan dengan menilai suasana diskusi dan memberikan pertanyaan tertutup melalui pra dan pascates. Sebanyak 29 ibu menyusui mengikuti kegiatan ini dengan rerata usia 29 tahun dan sebagian besar bekerja (80%). Para peserta antusias memberikan pertanyaan kepada para narasumber. Hasil evaluasi pra dan pascates menunjukkan ada peningkatan pengetahuan ibu menyusui sebesar 31% (p=0,000). Kegiatan pengabdian masyarakat berupa edukasi kandungan ASI dan pemberian ASIP berhasil dilakukan dengan baik. Edukasi mampu meningkatkan pengetahuan ibu menyusui. Edukasi atau penyuluhan dapat dilakukan untuk meningkatkan pengetahuan atau pemahaman masyarakat.Abstrak ditulis dalam bahasa Indonesia dan Inggris. Kata kunci: ASI, ASIP, edukasi, nutrisi, pengetahuan ABSTRACT Exclusive breastfeeding for babies has been recommended. It fulfills the baby's energy needs and provides nutrients that are necessary for baby's growth and development. However, the coverage of exclusive breastfeeding has not yet been sufficient, that is affected by the mother’s lack of knowledge about breast milk and the mother’s occupation. This community service aims to provide education to breastfeeding mothers about the content of breast milk and expressed breast milk to the breastfeeding mothers. The activities were performed by presenting 3 experts using online Zoom. Evaluation was done by assessing the atmosphere of the discussion and establishing closed questions through pre and post-test. A total of 29 breastfeeding mothers have participated in this activity with an average age of 29 years and most of them have job (80%). The participants were actively asking questions to the speakers. The results of the pre- and post-test evaluation showed that there was an increase in knowledge of breastfeeding mothers by 31% (p=0.000). It concludes that community service in the form of education activities on the content of breast milk and breastfeeding has been successful. Education or outreach activities has been proven to increase public’s knowledge and understanding of certain topic. Keywords: breast milk, education, expressed breast milk, knowledge, nutrition

Reports on antibody titers following CoronaVac administration are still scarce, particularly when it comes to the post-vaccination effectiveness of CoronaVac in the Indonesian population. The purpose of  this study is to determine the efficacy of COVID-19 vaccination by comparing the IgG levels against the S1 subunit of SARS-CoV-2 RBD after the first and second vaccinations. The researchers collected venous blood samples from participants after they received the CoronaVac 600 SU/0.5 mL vaccine at two different intervals (14 days and 28 days). Blood was drawn twice (after the first and second vaccinations) and tested for antibodies (positive antibody detection value of 50 AU/mL). Paired data were analyzed by using either the Wilcoxon test (numerical) or the McNemar test (categorical). The median IgG1 levels in the 14-day interval between vaccine doses were 64.40 AU/mL and IgG2 levels were 886.10 AU/mL. Meanwhile, the median IgG1 level was 146.10, and IgG2 level was 688.00.AU/mL in the group with a 28-day interval between vaccine doses. After the first vaccination, 60.00 % of study subjects had positive IgG levels, which increased to 98.57% after the second vaccination. Following the full-dose vaccination, all participants had higher antibody levels, and considered significant. The effect was stronger in the group that received the vaccine at 14-day intervals. CoronaVac has also been shown to increase the prevalence of detectable antibody positivity in study participants.