Adverse effects associated with COVID-19 vaccines in officials and students of the Faculty of Chemical Sciences of UNA, year 2021. Rev. Soc. cient. Py. [Internet]. 2023 May 31 [cited 2026 Nov. 11];28(1):71-83. Available from: https://sociedadcientifica.org.py/ojs/index.php/rscpy/article/view/304