Health Coronavirus Blood Pfizer Over two dozen cases of the rare blood disorder thrombocytopenia have been reported in people who have received COVID vaccines in the U.S. The U.S. Food and Drug Administration offers similar advice for the Pfizer COVID vaccine. At least 36 people may have developed a rare blood disorder, known as immune thrombocytopenia (ITP), after taking either Pfizer and BioNTech or Moderna's COVID-19 vaccines, according to a report. A … Distraught Heidi, 58, thinks the groundbreaking Pfizer-BioNtech vaccine may have somehow been the trigger. Specifically, Whelan was concerned that the new mRNA vaccine technology utilized by Pfizer and Moderna has “the potential to cause microvascular injury (inflammation and small blood clots called microthrombi) to the brain, heart, liver and kidneys in ways that were not … So it is a matter of certainty that viral antigens are present in the endothelial lining of blood vessels in all persons with active or recent SARS-CoV-2 infection — irrespective of whether they are symptomatic or convalescent. No blood clots have been associated with coronavirus vaccines made by Moderna or Pfizer, a US Centers for Disease Control and Prevention expert said Friday. A week after receiving the AstraZeneca Covid-19 vaccine, a 37-year-old woman in Norway went to the emergency department with fever and persistent headaches. London — A study by researchers at Oxford University in England suggests the risks of experiencing dangerous, rare blood clots in the brain are far … However he died from a stroke Sunday morning after suddenly developing a rare autoimmune illness that causes the body to destroy its own platelets, the tiny fragments that help blood to clot. A recent study from the New York Blood Center published in Science Magazine examined the efficacy of the Pfizer, Janssen Biotech and Moderna vaccines to combat variants of the virus. He pointed to a CDC presentation in January that showed people who received the Moderna and Pfizer vaccines were actually less likely to experience thrombocytopenia or … Dr. Willaim Gruber, Pfizer’s SVP of Vaccine Clinical Research and Development, received this email of warning.. Data show the number of people reporting blood clots after Pfizer or AstraZeneca's vaccine is almost identical, and neither is higher than normal.