Morales Alvarado, Sabrina YnésSantamaria Peraldo, Josselyn Natally2022-03-172022-03-172019-12-19https://hdl.handle.net/20.500.13053/5764El presente estudio es una revisión sistemática con un enfoque cualitativo, de tipo descriptivo sin realizar un análisis estadístico. Ámbito de estudio: Se realizó una recopilación metódica de artículos científicos publicados en revistas científicas y accObjective: Determine the effectiveness of the Covid-19 vaccine in pregnancy and breastfeeding. Design: non-experimental cross-sectional. Scope of study: Scientific publications with updated and recent information. Study subjects: The study population was made up of 60 investigations, collected from June to October 2021. Results: The study was made up of 31,588 pregnant women and 589 lactating mothers. The pregnant women were vaccinated with Pfizer 84%, modern 16%. 96% received 2 doses. During the second trimester, 35% were vaccinated, 20% in the first trimester and another 20% in the third trimester. 99% of pregnant women did not register complications during pregnancy. 79% of nursing mothers were vaccinated with Pfizer, 17% modern and 4% Chadox. 96% received 2 doses. The most recorded side effect was pain in the application area (80%). The presence of mRNA was not evident in breast milk. The formation of antibodies was evident in pregnant women, nursing mothers and in the newborn. Conclusion: The results found in this research support vaccination against COVID 19 in both stages. It is recommended to raise awareness among this vulnerable population so that they freely access vaccination.application/pdfspahttp://purl.org/coar/access_right/c_abf2https://creativecommons.org/licenses/by-nc-sa/4.0/EmbarazoEficacia de las VacunasLactancia MaternaPregnancyVaccine EfficacyBreast Feedinghttp://purl.org/coar/resource_type/c_7a1fhttps://purl.org/pe-repo/ocde/ford#3.02.02ODS 3: Salud y bienestar. Garantizar una vida sana y promover el bienestar de todos a todas las edades