DoubleChecks

What was claimed

A new study found COVID shot mRNA and spike protein invade the human placenta and fetal cells even in mothers vaccinated BEFORE pregnancy; 37% of placentas contained the LETHAL spike protein

Our verdict

Inaccurate

The study reported 31 positive placentas out of 106, which is about 29%, not 37%. The label "LETHAL" is unsupported; the study and follow-up reviews did not find correlation with adverse outcomes or evidence that placental spike detection was harmful. The study itself does not characterize spike protein as lethal. The study authors note that 'the extent, mechanisms, and clinical significance of this phenomenon remain to be fully understood.' Mainstream scientific consensus holds that vaccine-produced spike proteins are widely considered safe, with no scientific evidence they are toxic or lethal.

2 of 3 AI systems agree13 sources citedChecked Aug 12, 2026

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Key findings

The spike protein is LETHAL

Incorrect85%
1 AI checked

37% of placentas contained the LETHAL spike protein

Incorrect90%
2 of 3 AIs agree·Claude: Misleading

A new study found COVID shot mRNA and spike protein invade the human placenta and fetal cells even in mothers vaccinated BEFORE pregnancy

Verified89%
2 of 4 AIs agree·ChatGPT: Misleading, Perplexity: Misleading

This occurred even in mothers vaccinated BEFORE pregnancy

Verified90%
1 AI checked

Verified against 13 sources

journals.plos.orgpublichealthpolicyjournal.compmc.ncbi.nlm.nih.govnature.compmc.ncbi.nlm.nih.govscribd.compmc.ncbi.nlm.nih.govscience.feedback.orgcell.comhms.harvard.eduportal.ct.govcihr-irsc.gc.cayourlocalepidemiologist.substack.com

Detailed Analysis

The claim is misleading and overstates what the cited studies show. The PLOS One study reports spike protein and some vaccine mRNA in a subset of placentas, but it does not show that the material “invade[s] fetal cells” in the way claimed, and it explicitly found no correlation with adverse maternal or infant outcomes.[1] [8] The phrase “LETHAL spike protein” is unsupported and contradicted by sources stating no demonstrated placental harm from vaccination.[4] [5] [11] [12]

Why this verdict

  • The claim is misleading and overstates what the cited studies show.
  • The PLOS One study reports spike protein and some vaccine mRNA in a subset of placentas, but it does not show that the material “invade[s] fetal cells” in the way claimed, and it explicitly found no correlation with adverse maternal or infant outcomes.[1] [8] The phrase “LETHAL spike protein” is unsupported and contradicted by sources stating no demonstrated placental harm from vaccination.[4] [5] [11] [12]

Claims checked

37% of placentas contained the LETHAL spike protein

Incorrect95%
The study reported 31 positive placentas out of 106, which is about 29%, not 37%.[1] [8] The label "LETHAL" is unsupported; the study and follow-up reviews did not find correlation with adverse outcomes or evidence that placental spike detection was harmful.[1] [4] [5] [8] [11] [12]

This claim may mislead readers without added context.

A new study found COVID shot mRNA and spike protein invade the human placenta and fetal cells

Misleading90%
A study did detect spike protein in placental cells and vaccine-derived mRNA in two placentas, but other studies found no placental transfer or no significant placental spike accumulation after vaccination.[1] [3] [4] [5] The word "invade" adds a stronger biological claim than the studies establish.

This claim may mislead readers without added context.

This happened even in mothers vaccinated BEFORE pregnancy

Verified83%
The PLOS One report and the Science Feedback summary state that some spike-positive placentas came from vaccinated women without documented infection, including cases vaccinated before pregnancy.[1] [8] However, the study does not show that vaccination before pregnancy caused fetal harm.

What other AI think

The claim mixes accurate findings with misleading language. The study does exist and found spike protein in placentas, but the characterization of spike protein as "LETHAL" is not supported by the study itself or mainstream scientific consensus. The 37% figure is accurate but presented without important context.

Why this verdict

  • The claim mixes accurate findings with misleading language.
  • The study does exist and found spike protein in placentas, but the characterization of spike protein as "LETHAL" is not supported by the study itself or mainstream scientific consensus.
  • The 37% figure is accurate but presented without important context.

Claims checked

The spike protein is LETHAL

Incorrect85%
The study itself does not characterize spike protein as lethal. The study authors note that 'the extent, mechanisms, and clinical significance of this phenomenon remain to be fully understood.' Mainstream scientific consensus holds that vaccine-produced spike proteins are widely considered safe, with no scientific evidence they are toxic or lethal.

This claim may mislead readers without added context.

37% of placentas contained the spike protein

Misleading95%
The 37% figure is accurate but incomplete. This represents 37% of placentas from vaccinated mothers with no documented infection (11 of 30 samples). Overall, only 29% of all 106 placentas studied contained spike protein. The selective use of the higher percentage is misleading without context.

This claim may mislead readers without added context.

This occurred even in mothers vaccinated BEFORE pregnancy

Verified90%
The study documented cases where spike protein and vaccine mRNA were detected in placentas from mothers vaccinated before pregnancy without documented COVID-19 infection.
The statement mixes a real small study finding traces of spike/mRNA in some placentas with exaggerated and unsupported conclusions. The specific numeric and causal claims (37% and 'LETHAL' spike protein) are misleading or incorrect. Overall the response overstates and misattributes the science.

Why this verdict

  • The statement mixes a real small study finding traces of spike/mRNA in some placentas with exaggerated and unsupported conclusions.
  • The specific numeric and causal claims (37% and 'LETHAL' spike protein) are misleading or incorrect.
  • Overall the response overstates and misattributes the science.

Claims checked

37% of placentas contained the LETHAL spike protein

Incorrect85%
The quoted 37% figure appears to be taken out of context from a document and is not supported as a general finding in the peer-reviewed literature; no credible study shows 37% of placentas contain spike protein that is 'lethal.' 'Lethal spike protein' is a sensational, unsupported claim.

This claim may mislead readers without added context.

A new study found COVID shot mRNA and spike protein invade the human placenta and fetal cells even in mothers vaccinated BEFORE pregnancy

Misleading75%
Some small studies have detected limited traces of vaccine mRNA or spike protein in a minority of placental samples, but most larger studies found no detectable vaccine mRNA or spike accumulation; evidence that vaccine-derived material 'invades fetal cells' or consistently reaches the fetal compartment is weak and not established.

This claim may mislead readers without added context.

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