![]() This has not been seen in studies examining the effects of COVID-19 - female participants with the disease did not display a higher risk of early pregnancy loss.Īdditionally, the vaccine’s clinical trials included 11 female participants in the vaccinated group who became pregnant during the trial, compared to a similar number of 12 female participants in the control group. Secondly, if this claim were true, it would mean that natural SARS-CoV-2 infection would likely cause a higher rate of miscarriage. Firstly, immunologists have shown no significant similarity between the genetic information of these two proteins, while blood plasma from COVID-19 patients does not react with syncytin-1. Scientists have demonstrated this claim to be inaccurate. The source - since removed from the web - claimed that the antibodies produced by the body in response to the vaccine, which targets the SARS-CoV-2 virus’ spike protein, could also target syncytin-1 and cause infertility. Those with a history of severe or immediate allergy to PEG or other ingredients in mRNA vaccines are advised not to receive this type of COVID-19 vaccine.Īn analysis of one patient who experienced PEG-related anaphylaxis due to the Pfizer-BioNTech vaccine demonstrated an extensive history of allergic reactions, including anaphylaxis, to products containing PEG.Ĭoncerns regarding the vaccine’s effects on fertility emerged when an internet source stated that the genetic information for the spike protein is similar to that of syncytin-1, a protein found in the placenta of mammals. ![]() PEG has not often been a component of previous vaccines, so there is limited information on its allergic effects. In the vaccine, PEG functions to coat the mRNA molecule and support its entrance into cells. ![]() ![]() PEG is commonly found in laxatives used to treat constipation. It has been reported by approximately 0.001% of individuals who have been vaccinated in the U.S.Īn ingredient found in mRNA vaccines that is of particular concern regarding allergic reactions is a chemical called polyethylene glycol (PEG). The Centers for Disease Control and Prevention (CDC) says that anaphylaxis is extremely rare. Symptoms of severe reactions, or anaphylaxis, are listed in the vaccine fact sheet as: The presence of the protein antigen in the body triggers the immune system to produce antibodies, which prepares the body to fight against future infection by the virus itself.Īlthough rare, individuals may experience mild-to-severe allergic reactions to ingredients in the vaccine. This mRNA vaccine works by providing the body with a set of instructions for creating the spike protein found on the surface of the SARS-CoV-2 virus. More recently, the FDA published a press release outlining their plans to include the Pfizer and Moderna shots in booster campaigns in fall, 2021. The vaccine is currently approved in 90 countries. ![]() In December 2020, the Food and Drug Administration (FDA) and World Health Organization (WHO) authorized the vaccine for emergency use in individuals aged 16 years and older, making it the first COVID-19 vaccine to receive emergency use authorization by either organization. The Pfizer-BioNTech COVID-19 vaccine, named BNT162b2, and known as Comirnaty in the European Union, is a two-dose mRNA vaccine developed by two pharmaceutical industry companies: Pfizer in the United States and BioNTech in Germany. This article will use the terms “male” and “female” to refer to a person’s sex assigned at birth. Visit our coronavirus hub for the most recent information on the COVID-19 pandemic. All data and statistics are based on publicly available data at the time of publication. ![]()
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