![]() He based his claim on several studies that we discuss below, which evaluated the effect of the spike protein on blood vessels. Bridle claimed that the spike protein alone is responsible for most of these vascular complications in COVID-19 patients. Complications such as irregular heartbeat, blood clots, heart failure, and stroke can occur even after the patient recovers. ![]() Evidence that the spike protein from SARS-CoV-2 cause cardiovascular damage is preliminaryĪlthough COVID-19 is primarily a respiratory disease, several studies showed that the disease causes cardiovascular damage in many patients. In contrast, mRNA COVID-19 vaccines ( Pfizer-BioNTech and Moderna) use mRNA carried within fat droplets called lipid nanoparticles. The genetic instructions are delivered within a modified harmless version of an adenovirus similar to the one that causes the common cold. Viral vector-based COVID-19 vaccines ( Johnson & Johnson and the Oxford-AstraZeneca vaccine, authorized for emergency use in the European Union and other countries but not in the U.S.) deliver the genetic instructions for making the protein in the form of DNA. Instead, they instruct the cells to produce the protein on their own. Food and Drug Administration (FDA) contains the spike protein. None of the COVID-19 vaccines authorized for emergency use by the U.S. These vaccines work by exposing the body to the spike protein of SARS-CoV-2, the virus that causes COVID-19, thereby training the immune system to respond more rapidly and effectively when it encounters the virus in the future. That is why the majority of COVID-19 vaccines target this protein. Īn immune response against the spike protein could eliminate infected cells while preventing the virus from entering the cells and producing more viral particles. The spike protein allows the virus to enter the cells by binding to a receptor called angiotensin-converting enzyme 2 (ACE2) that sits on the surface of some cells. They receive their name from a crown ( corona, in Latin) of spikes made of protein that cover the surface of the virus when observed under an electron microscope. ![]() ![]() What is the spike protein?Ĭoronaviruses are a large family of viruses that cause respiratory illnesses in animals and humans. In this review, we explain why these three assumptions are unsupported by current evidence. The vaccine-derived spike protein enters the bloodstream and accumulates at harmful levels in tissues, such as the spleen, bone marrow, liver, adrenal glands, and ovaries.The vaccine-derived spike protein damages the body in the same way as the spike protein produced during viral infection.The spike protein from SARS-CoV-2 alone is the main cause of blood vessel damage in COVID-19 patients.Scientists who reviewed this claim for Health Feedback found it misleading because it misrepresented the results from scientific studies and was based on cherry-picked information.īridle’s claim was based on three assumptions: The interview received more than 39,000 interactions on Facebook, according to the social media analytics tool CrowdTangle.ĭuring the interview, Bridle claimed that the spike protein produced through COVID-19 vaccination, which generates immunity against the disease, enters the bloodstream and can damage the blood vessels and brain. Many posts and articles (see examples here and here), like this article from LifeSiteNews, based this claim on a radio interview between the Canadian broadcaster Alex Pierson and the immunologist Byram Bridle. In late May 2021, the claim that COVID-19 vaccines could cause blood vessel damage to vaccinated people went viral on social media platforms, including Facebook, Instagram, Reddit, and Twitter. FULL CLAIM: “The infamous spike protein of the coronavirus gets into the blood where it circulates for several days post-vaccination and then accumulated in organs and tissues including the spleen, bone marrow, the liver, adrenal glands, and in quite high concentrations in the ovaries” “a large number of studies has shown that the most severe effects of SARS-CoV-2, the virus that causes COVID-19, such as blood clotting and bleeding, are due to the effects of the spike protein of the virus itself” Clinical trials and ongoing vaccination campaigns, which have vaccinated more than 890 million people worldwide, demonstrated that COVID-19 vaccines are very safe and effective at preventing the disease. induce the cells to produce the spike protein, the protein generated through vaccination behaves differently from the spike protein produced in infection. While the three COVID-19 vaccines authorized for emergency use in the U.S. Recent studies suggested that the spike protein produced during infection alone might cause cardiovascular damage in COVID-19 patients. The spike protein of SARS-CoV-2 allows the virus to bind to and infect cells, making it an ideal target for vaccine development.
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