Timing of Maternal COVID-19 Vaccine and Antibody Concentrations in Infants Born Preterm.

Timing of Maternal COVID-19 Vaccine and Antibody Concentrations in Infants Born Preterm.

Publication date: Jan 02, 2024

COVID-19 vaccine-derived antibodies in pregnant people may protect infants from severe infection in the first 6 months of life via transplacental antibody transfer. Few data exist on maternally derived SARS-CoV-2 antibodies in preterm compared with full-term infants in association with vaccination timing. To compare SARS-CoV-2 anti-Spike (anti-S) antibody levels in preterm and full-term infants in the context of vaccine dose timing before delivery. This prospective cohort study enrolled pregnant individuals and collected paired maternal and cord blood samples at delivery at the University of Washington between February 1, 2021, and January 31, 2023. Participants who had received at least 2 doses of a messenger RNA COVID-19 vaccine before delivery and did not have a history of prior COVID-19 infection or detectable anti-SARS-CoV-2 nucleocapsid antibodies were included. Timing of the last vaccine dose and preterm or full-term gestational age at delivery. Paired maternal and cord samples were tested for anti-S antibody, and linear regression was used to evaluate associations between preterm delivery and anti-S antibody levels. Covariates included timing of last dose, number of doses, insurance status, and immunosuppressing medications. A total of 220 participants (median [IQR] age, 34 [32-37] years; 212 [96. 4%] female) with 36 preterm and 184 full-term deliveries were studied. Before delivery, 121 persons received 2 vaccine doses and 99 persons received 3 or more vaccine doses. The geometric mean concentration of maternal anti-S antibodies was 674 (95% CI, 577-787) after 2 doses and 8159 (95% CI, 6636-10 032) after 3 or more doses (P 

Open Access PDF

Concepts Keywords
Preterm Anti
Severe Antibodies
Vaccine Antibody


Type Source Name
disease VO COVID-19 vaccine
disease MESH infection
disease VO vaccination
disease VO vaccine dose
disease IDO history
disease MESH COVID-19
disease VO dose
disease VO vaccine

Original Article

(Visited 1 times, 1 visits today)