Pfizer’s COVID-19 vaccine has been linked to blood clotting in older individuals, according to the U.S. Food and Drug Administration (FDA).
FDA researchers, crunching data from a database of elderly persons in the United States, found that pulmonary embolism—blood clotting that forms in the body and winds up blocking blood flow in the lungs—met the initial threshold for a statistical signal and continued meeting the criteria after a more in-depth evaluation.
