Side Effects of COVID-19 Vaccines in Pregnant and Lactating Mexican Women and Breastfed Infants: A Survey-Based Study

COVID-19 vaccines’ safety has been extensively studied; however, further analysis is required in pregnant women, nursing mothers, and breastfed infants. Our aim was to compare the extension severity of self-reported vaccine side effects breastfeeding In this cross-sectional study, COVID-19-vaccinated subjects were enrolled using an online survey Mexico. Women classified by pregnancy status at time vaccination (n = 3167). After first or only dose, there a trend toward fewer systemic women (p 0.06). BNT162b2 (Pfizer–BioNTech) had higher frequency local symptoms pregnancy. Lactating experienced after single dose 0.04) opposite occurred second 0.001). ChAdOx1 (AstraZeneca) increased chances developing both but decreased them dose. The similar across groups, although result lack association requires studies with larger sample size. Irritability most reported symptom This study contributes knowledge about lactating babies.