COVID-19 vax timing in pregnancy crucial to optimal immune response: study

Placental transfer of SARS-CoV-2 antibodies was most efficient in first trimester, US researchers say

Women vaccinated against COVID-19 in their first and third trimesters have a stronger immune response than those vaccinated in their second trimester, new research shows.

Placental transfer of SARS-CoV-2 antibodies to the fetus also appears to be more robust following first and second trimester vaccination, according to US clinicians.

“For pregnant individuals vaccinated in the first trimester, both maternal and neonatal immunity may be further enhanced by boosting in the third trimester,” the authors reported in Nature