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Monday, May 11, 2026

Fact check: Misinterpretation leads to false claim about Pfizer's COVID-19 vaccine and pregnancy - USA TODAY

The claim: 44% of pregnant women who participated in a Pfizer COVID-19 vaccine trial had miscarriages

Multiple studies have found people who received a COVID-19 vaccine just before or during early pregnancy were not at increased risk for miscarriage, according to the Centers for Disease Control and Prevention.

But a claim spreading online warns that 44 percent of pregnant women who participated in a Pfizer COVID-19 vaccine trial suffered miscarriages.

The claim was first published by the Daily Clout, a website run by author Naomi Wolf, who last year was suspended from Twitter after spreading vaccine-related misinformation. The article, which has since been deleted, cited a 3,600-page document it claimed revealed that 22 of 50 women who became pregnant during a Pfizer vaccine trial had miscarriages.

“According to Dr. Naomi Wolf, who runs a crowdsourced project to analyze 300,000 Pfizer documents released via a FOIA request, 44 percent of pregnant women who participated in the drug maker’s COVID-19 vaccine trial lost their babies,” reads an Aug. 16 Facebook post by PragerU social media influencer Will Witt that was shared more than 300 times.

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But the claim is based on a misinterpretation of the vaccine trial document, Jeffrey Morris, a biostatistics professor at the University of Pennsylvania’s Perelman School of Medicine, told USA TODAY.

Morris examined the document and found that...



Read Full Story: https://www.usatoday.com/story/news/factcheck/2022/09/22/fact-check-false-cla...