Suharti. Nutrition In Improving Body Immunity as an Effort Protection of COVID-19 For Teachers of SMP Negeri 1 Perak Jombang. gandrung [Internet]. 2021 Jul. 19 [cited 2026 Jan. 15];2(2):192-7. Available from: https://ejournal.unibabwi.ac.id/index.php/gandrung/article/view/1175