The U.S. Food and Drug Administration (FDA) has announced that new evidence has emerged linking Pfizer Covid shots to blood clotting, according to reports.
FDA researchers found that the vaccines are linked to pulmonary embolisms in older people.
A pulmonary embolism is blood clotting in the lungs.
After analyzing data from a federal database of elderly persons in the United States, researchers found evidence that met the initial threshold for a statistical signal.
They revealed that the pulmonary embolism signal in the data continued to meet the criteria after a more in-depth evaluation.
Researchers also warned that the investigation also raised red flags for three other outcomes of interest.
The study found that the vaccines are also linked to a lack of oxygen to the heart, a blood platelet disorder called immune thrombocytopenia, and another type of clotting called intravascular coagulation.
More in-depth evaluations, such as comparisons with populations who received influenza vaccines, showed those three as no longer meeting the statistical threshold for a signal.
Researchers looked at data covering 17.4 million elderly Americans who received a total of 34.6 million vaccine doses between December 10, 2020, and January 16, 2022.
The study was published in the journal Vaccine.
However, despite the concerns raised by the study, the FDA said it was not taking any action on the results.
The federal agency argues that the results do not prove the vaccines cause any of the four outcomes.
The FDA insists that the findings “are still under investigation and require more robust study.”
Dr. Peter McCullough, chief medical adviser for the Truth for Health Foundation, responded by noting that the study supports long-raised concerns.
McCullough told The Epoch Times via email that the new paper “corroborates the concerns of doctors that the large uptick in blood clots, progression of atherosclerotic heart disease, and blood disorders are independently associated with COVID-19 vaccination.”