All the pregnant women in Estonia who conceived and gave birth between February 27, 2020, and March 1, 2023 were included in the study. Pregnant women will be divided into 2 groups: 1. pregnant women who were diagnosed with COVID-19 during the study period, along with their newborns; 2. control group: pregnant women who did not have COVID-19 during pregnancy, along with their newborns. The following data is collected for each subject: prior vaccination, previous COVID-19 infection, underlying diseases/conditions, hospitalization, need for intensive care, need for mechanical ventilation and/or oxygen therapy, death cases, post-COVID-19 symptoms, pregnancy course and outcomes, possible virus transmission from mother to child, and the newborn's condition or accompanying health issues
