Morales Alvarado, Sabrina YnésSantamaria Peraldo, Josselyn Natally2022-03-172022-03-172019-12-19https://hdl.handle.net/20.500.13053/5764Objective: 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.El 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 accapplication/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