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mRNA COVID-19 vaccine and placenta crossing

The claim that a self-amplifying mRNA COVID-19 vaccine crossed the placenta, reached the fetus, and caused severe cardiovascular problems at birth

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Jan 7, 2026

Asserts that a self‑amplifying mRNA COVID‑19 vaccine crossed the placenta, reached the fetus, and caused severe cardiovascular problems at birth.

The claim that a self‑amplifying mRNA COVID‑19 vaccine crossed the placenta, reached the fetus, and caused severe cardiovascular problems at birth is not supported by the bulk of published studies: se...