A preschool-aged child died of cardio-respiratory arrest after getting a COVID-19 booster in a Moderna clinical trial. However, Moderna didn’t reveal the death to the public and only recently reported it on a European regulatory agency database, Alex Berenson reported.

The death occurred in late 2022 or early 2023, Berenson said, when children under 5 who had already received Moderna’s original mRNA-1273 COVID-19 vaccine in the trial’s main phase were offered the “1273.214” booster against an early Omicron variant.

Berenson, a former New York Times reporter who now reports on his Unreported Truths Substack, today said the U.S. Food and Drug Administration (FDA) has declined to tell him whether the U.S. agency knew that a child died during Moderna’s clinical trial.