What question did this study set out to answer?

This study aims to examine how mild SARS-CoV-2 infection and vaccination affect the placenta during pregnancy.

Alterations in the Placenta Following Vaccination and Infection with SARS-CoV-2 During Pregnancy

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Randomized trial investigates placental immune response to SARS-CoV-2 in vaccinated women, suggesting significant immunological changes.

This study aims to examine how mild SARS-CoV-2 infection and vaccination affect the placenta during pregnancy.
Analyzed 118 placentas collected between the 37th and 40th week of gestation using real-time PCR and Western blot.
Assessed secreted mediators in placental cell culture supernatants and performed histological examinations.
Compared expression levels of various immune-related molecules in control, vaccinated, and previously infected women.
Significant changes in S100B, IL6, and CCL5 expression observed in control versus vaccinated and infected groups (exact metrics not detailed).
Acute SARS-CoV-2 infection resulted in reduced p38 MAPK and Bcl-2 expression compared to controls.
Increased secretion of G-CSF, IFN-α2, IL-2, and CXCL8 in infected or vaccinated women, but histological differences were minimal.

Hoymann et al. (2026) studied this question.

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