A small study by researchers at Harvard Medical School and Beth Israel Deaconess Medical Center adds to a growing body of research that COVID-19 vaccines are safe during pregnancy and will play an important role in disease prevention in pregnant women. The findings, published in JAMA, show that mRNA-based COVID-19 vaccines triggered immune responses in pregnant and lactating women. Further analyses also revealed that maternal vaccine antibodies are transferred into infant cord blood and breast milk.
