is there sulfa in the covid vaccine

Both sulfa medications and sulfite can cause allergic reactions, but these two conditions are not related. There was previous anaphylaxis to: a rabies vaccine, sulfa drugs, a jellyfish sting, walnuts, an anti-nausea medication, a flu vaccine and one case was unspecified. 90% of the anaphylaxis patients were women, however 65% of those vaccinated were also women. The median age was 40 years old; there were no clusters of reactions by geography. It does not list human male aborted fetus cells, triton X-100, thimerosal, or aluminum in its ingredients. TritionX-100 is a detergent used in spermicide. privacy practices. (Read about other potential mRNA vaccine reaction causeshere. pollen, dust) or latex allergies. A history of allergy to oral medications. Non-serious allergy to vaccines or other injectables (e.g. Sign up for Yahoo Lifes daily newsletter, reservations about the coronavirus vaccine, If You've Done This Recently, You Could Have a Bad Vaccine Reaction, allergies are a reason to hold off on getting vaccinated, monitored for 30 minutes after their shot, The FDA Just Ruled You Can't Do These 4 Things With the COVID Vaccines, Lacking This Vitamin Could Put You at Risk of Severe COVID, New Study Says, The New COVID Strain Is Now in These 8 States, These Are the First Pharmacies Where You Can Get the COVID Vaccine, Women who had ovarian cysts share their stories, Why 'Love Is Blind' star Deepti Vempati didn't talk about her eating disorder with her family, Christina Aguilera says stigma 'that it's shameful to get older' in the public eye makes her 'really sad'. Data from tens of thousands of reporting individuals have shown that the COVID-19 vaccine is both safe and effective when administered during pregnancy. In the manufacture of viral vaccines, the virus may be grown in cells. Ponka, D. (2006, November 1). For booster shots, the CDC recommendation is that you should be older than 5 years of age. Those at higher risk of experiencing such a reaction include people with: Stevens-Johnson syndrome is another rare but severe form of a sulfa allergy, which affects a persons skin, mucous membrane, genitals, and eyes. If you're unfamiliar with them, antibodies are proteins your immune system makes to fight infections like viruses. What happens if you have an allergic reaction after receiving the vaccine. The CDC looked into these patients' past history of allergies and allergic reactions, and shared their findings. This website uses cookies so that we can provide you with the best user experience possible. The U.S Centers for Disease Control and Prevention is issuing new allergy guidelines for the COVID-19 vaccine. This claim is false. Vaccine providers should observe patients with a history of anaphylaxis (due to any cause) for 30 minutes after vaccination, the agency says. We asked two allergist-immunologists at Massachusetts General Hospital to expand on the questions about dairy allergy and alpha-gal allergy safety. False. Given the context that those reactions were out of 1.9 million doses administered, the CDC said a severe reaction to the COVID-19 vaccine appears to be a rare event. (The rate of reaction has further decreased.). New Covid Boosters Were Released Before Human TestingBut Experts Say They're Still Safe, FDA Grants Emergency Use Authorization for Novavax's COVID-19 Vaccine, Getting the COVID-19 Vaccine: What to Expect Before, During, and After Your Appointment, COVID-19 Boosters Are Being Updated To Target Omicron SubvariantsHere's Why, Study: mRNA Vaccines Fare Better Against COVID Variants, How the COVID-19 Vaccines Were Made So Quickly. These small quantities of antibiotics have never been clearly found to cause severe allergic reactions. Today's vaccines use only the ingredients they need to be safe and effective.\\n\\n\\nA note on vaccine safety\\nVaccines go through comprehensive safety and effectiveness testing. Trition X 100 or octylphenol ethoxylate is an ingredient that is present in some influenza vaccines (here , here ). Sometimes the shots can cause mild flu-like symptoms as a side effect. An official website of the United States government, : Yet, while PEG is implicated in unrelated cases of medication anaphylaxis, its an uncommon allergy, says Dr.Kimberly Blumenthal, a drug allergy expert at Massachusetts General Hospital. None of the finished COVID-19 vaccines used in the U.S. contain actual HEK cells ( here , here ), so it is not correct to describe them as a component of the vaccine. Both recovered at the time of the CDC report. As PEG is a component of the mRNA vaccines, is that safe for people with soy allergy? The Moderna COVID-19 vaccine is administered into the muscle in two doses, one month apart (here ). Nitrofurantoin. We link primary sources including studies, scientific references, and statistics within each article and also list them in the resources section at the bottom of our articles. There is no egg or egg-related component of the RNA vaccines, says Baker. What severe reactions have occurred in the U.S.? Will the patient be vaccinated in a setting where. Nat Med. ACOG adds that: acetaminophen is recommended for pregnant women who experience fever or if desired for other side effects. A s vaccines to protect against COVID-19 continue to roll out across the United States, . American College of Allergy, Asthma & Immunology. (2010, December 31). Learn how to identify and manage allergies here. Dapsone. It includes mRNA, lipids, potassium chloride, monobasic potassium phosphate, sodium chloride, dibasic sodium phosphate dihydrate and sucrose. Is polyethylene glycol (PEG) to blame for the few anaphylaxis cases to the vaccines? Learn more about vaccine safety.\\n\\n\\nEach ingredient in a . [Update:] The May 2022 results concluded these study participants werent at higher risk of reaction. The Janssen COVID-19 Vaccine includes the following ingredients: recombinant, replication-incompetent adenovirus type 26 expressing the SARS-CoV-2 spike protein, citric acid monohydrate, trisodium citrate dihydrate, ethanol, 2-hydroxypropyl--cyclodextrin (HBCD), polysorbate-80, sodium chloride." 4 Blumenthal agrees, tellingAllergic Living:Soy allergy is from protein, never plant-derived fatty acids (the lipids that Baker references). He says the confusion with spermicide comes from users confusing two similar but different ingredients (octoxynol-9, a spermicide, and octoxynol-10, a different type of Triton X-100 nonionic surfactant used in vaccines). The most dangerous is anaphylaxis or Stevens-Johnson syndrome. Included is detail on how to manage them and whether you can live with a cat if you have, A person with a food allergy must avoid all contact with a specific food, or they may have a severe, even life-threatening reaction soon afterward. Here is a breakdown of the three COVID vaccines and their ingredients: Pfizer Vaccine: The full list of ingredients for the Pfizer vaccine is: mRNA, lipids ( (4-hydroxybutyl)azanediyl)bis (hexane-6,1-diyl)bis (2-hexyldecanoate), 2 In its report on the Pfizer vaccine,the FDA writes: The observed frequency of reported Bells palsy in the vaccine group is consistent with the expected background rate in the general population, and there is no clear basis upon which to conclude a causal relationship at this time, but FDA will recommend surveillance for cases of Bells palsy with deployment of the vaccine.. An allergy to sulfonamide medications is different from having an adverse reaction to wine or food that contains sulfites. Importantly, she adds as a drug allergy expert: Soy-allergic patients tolerate PEG all the time., In rare cases, PEG has triggered allergic reactions. The latest daily figures for the UK, published on Wednesday, showed a further 533 people have now died within 28. Shingrix, a vaccine for the prevention of shingles in adults 50 years of age and older, includes AS01B. The vaccine recipient should also mention to the healthcare provider if "you have received another COVID-19 vaccine," Serum Institute said. So, you can search online, or you can keep scrolling to learn everything you need to know about this vaccine. These cells need a source of nutrition, which in some instances may be provided by fetal bovine serum. Any use of this site constitutes your agreement to the Terms and Conditions and Privacy Policy linked below. Mayo Clinic is a nonprofit organization and proceeds from Web advertising help support our mission. Box 1042 Montanaro A. Sulfonamide allergy in HIV-uninfected patients. Well, Doc. The Pfizer/BioNTech and Moderna vaccines, are not made using human cells, but they have been used in vaccine testing. The Vaccine Adverse Event Reporting System (VAERS) reported that there were 10 cases of anaphylaxis after about 4.04 million first doses of the Moderna vaccine (2.5 cases per million doses) and 21 cases of anaphylaxis after about 1.89 million first doses of the Pfizer-BioNTech COVID-19 (11.1 cases per million doses). The Moderna COVID-19 vaccine (Spikevax) also uses mRNA technology. Sulfa allergy Which medications should I avoid, Advertising and sponsorship opportunities, Sulfamethoxazole-trimethoprim (Septra, Bactrim), Sulfasalazine (Azulfidine), used to treat Crohn's disease, ulcerative colitis and rheumatoid arthritis, Dapsone, used to treat leprosy, dermatitis and certain types of pneumonia, Certain diabetes medications glyburide (Glynase, Diabeta) and glimepiride (Amaryl), for example, Some nonsteroidal anti-inflammatory drugs, such as celecoxib (Celebrex), The migraine medication sumatriptan (Imitrex), Certain "water pills" (diuretics), such as furosemide (Lasix) and hydrochlorothiazide (Microzide). The triggers for the anaphylaxis varied among the patients. An independent panel advising the FDA reviewed the data on the Moderna mRNA vaccine and voted strongly to recommend the FDA give an EUA to the vaccine, initially for those 18 and older. 14304, Allergic Living The very small amounts of antibiotics contained in vaccines have not been clearly associated with severe allergic reactions. Should you have any adverse side effects, V-safe lets you to report them to assist in data gathering awareness. And if you're eager to get your shot, These Are the First Pharmacies Where You Can Get the COVID Vaccine. There are more than 5 million doses of the vaccine currently in the country. What Are the Differences Between the Pfizer and Moderna COVID-19 Vaccines? Some allergic reactions have been reported by people who got the COVID-19 vaccines, but the majority are considered mild or moderate cases that result in a rash and fever. The report acknowledges multiple limitations of the study, chief among them that the data came from . A fact sheet on the FDAs website here discloses the ingredients in the vaccine. On Dec. 18, 2020, the FDA gave its authorization, while an advisory committee to the CDC also voted strongly in favor of the authorization. Cardiovascular health: Insomnia linked to greater risk of heart attack. The lipids are "how the vaccine is delivered to your body and to your cells," explainedAmesh A. Adalja, MD, an adjunct assistant professor specializing in biosecurity, emerging infectious diseases, and health security at the Johns Hopkins Bloomberg School of Public Health in Baltimore. Four COVID-19 vaccines have been granted Emergency Use Authorization (EUA) from the U.S. Food and Drug Administration (FDA) since mid-December 2020. In a September 2021 consensus statement, they wrote: Maternal care experts want the best outcomes for their patients, and that means both a healthy parent and a healthy baby. TheFood and Drug Administrationapproved the Pfizer-BioNTech COVID-19 vaccine (Comirnaty) on August 23, 2021, for people over 16. Neither vaccine contains food proteins. As we discuss in a separate news report here, the majority of those few cases involved women and those with allergy histories. Health's content is for informational and educational purposes only. The post reads: The CDCs new slogan is #VaccinateWithConfidence. And as of May 2022, they expanded the emergency use authorization to include children between five and 11 who received their primary vaccine five months prior. Allergists Assess Safety and Reaction Risks, How to Tell an Allergy from a Side Effect; Plus COVID arm, Likely More than 1 Cause of COVID-19 Vaccine Reactions, Severe Reactions to COVID-19 Vaccines Are Rare, Women Most Affected, Some Reactions to Vaccines Expected; But Not Reason to Avoid Shot, CDCs FAQ of General COVID-19 Vaccination Questions, U.S. EpiPen Supply Issue a Spot Shortage, says FDA, Hospital Breakfast Linked to Allergic Teens Death, Allergy Lawsuit Against Airline Thrown Out of Court, Tweens with Milk Allergy Often Shorter, Smaller Than Peers. The CDC says: recent reports have shown that breastfeeding people who have received mRNA COVID-19 vaccines have antibodies in their breastmilk, which could help protect their babies. But how do these novel therapies work with the immune system? Methylmercury is a type of mercury found in some types of fish and high exposure levels can be toxic to humans. However, Baker notes: PEGderivatives that cause allergies usually involve some different protein. The Moderna and Pfizer-BioNTech COVID-19 vaccines are the first two COVID-19 vaccines authorized by the Food and Drug Administration for emergency use and already have been given to millions of Americans. Licensed Vaccines. Hundreds of thousands more are sickened, many of them. In the shot, these viruses are inactivated, or dead, so they cannot cause the flu. This information is from FDA briefing documents used in the agencys independent reviews of the Pfizer BioNTech and Moderna COVID-19 vaccines. Carrying a medical alert card or medical alert bracelet that details any allergies will help to ensure appropriate treatment, as the person may not be able to communicate this themselves in an emergency. There are no food allergies that make the vaccine unsafe. The claim has been shared in a video, which can be seen (here, here).The footage shows the ingredients list for the Pfizer-BioNTech COVID-19 vaccine, which shows it contains lipid nanoparticles. The AS03 adjuvant is made up of the oily compounds, D,L-alpha-tocopherol (vitamin E) and squalene, and an emulsifier, polysorbate 80, which helps ingredients mix together and keep them from separating, and water containing small amounts of salts. The FDA conducted an independent analysis of Pfizers clinical trial results, and found a few instances of potential minor allergic reactions among participants. Sulfonamide allergy in HIV-uninfected patients. Sulfonamides, Sulphur allergy symptoms: Foods to avoid with sulfa allergy. Today, sulfa is present in many medications, including eye drops, burn creams, and vaginal suppositories. You can find out more about which cookies we are using or switch them off in settings. There is no cross-reaction between soy allergy and allergy to other PEG-conjugatedproteins.. painful or difficult urination. A person who thinks they have a sulfa allergy should either avoid the following medications or talk to their doctor about taking any of them: However, not every medication that contains sulfonamides will trigger a reaction in people with a sulfa allergy. Sulfites are used as additives and preservatives in many wines and foods. Montanaro, A. Another was a 44-year-old woman who had a history of anaphylaxis due to the flu vaccine. information is beneficial, we may combine your email and website usage information with Health officials keep stating that the 'studies done to support the Emergency Use Authorization of the COVID vaccine' resulted in this . You can learn more about how we ensure our content is accurate and current by reading our. All rights reserved. There is no latex in the mRNA COVID-19 vaccines. Fewer people should get sick, and more lives can be saved. The doctor, who experienced a drop in blood pressure, administered his own epinephrine auto-injector (which he carries due to a shellfish allergy). COVID-19 vaccine ingredients are considered safe for most people. The Centers for Disease Control and Prevention (CDC) says that any patient with a history of allergic reaction to any vaccine or injectable therapy and anyone with a history of severe allergic reaction, known as anaphylaxis, should be monitored for 30 minutes after their shot. Having a reaction to sulfites in something you eat or drink doesn't mean you'll be allergic to sulfonamide medication. Coronavirus updates: Vaccine distribution has begun; FDA officials assure public that Pfizer vaccine is safe. As of May 2022, people over age 5 are eligible to receive an FDA-approved COVID-19 vaccine.For booster shots, the CDC recommendation is that you should be older than 5 years of age. If you enroll someone whos had anaphylaxis to a prior vaccine and then they have anaphylaxis to this vaccine, it just clouds all the data. Stukus also stressed that true anaphylaxis to any vaccine is rare., Related Reading:J&J Vaccine: Allergists Assess Safety and Reaction RisksCOVID-19 Vaccines: How to Tell an Allergy from a Side Effect; Plus COVID armLikely More than 1 Cause of COVID-19 Vaccine ReactionsCDC Update: Severe Reactions to COVID-19 Vaccines Are Rare, Women Most Affected Some Reactions to Vaccines Expected; But Not Reason to Avoid ShotCDCs FAQ of General COVID-19 Vaccination Questions, E-Mail: info@allergicliving.com The CDC specifies that the two vaccines do not contain eggs. If you have never experienced a severe allergic reaction and dont carry epinephrine: call 9-1-1 and mention this is an anaphylactic reaction and that you need an ambulance carrying epinephrine. The nasal spray contains live . Like any vaccine, the COVID-19 vaccines do come with potential side effects. Read our. "The rest of the ingredients are very common in vaccines.". In the first week and a half of the US Covid-19 vaccine effort, the CDC said there have been 21 additional confirmed cases of severe allergic reactions known as anaphylaxis, bringing the. There is a problem with The CDC says that for either the Pfizer-BioNTech or Moderna vaccines, you should not get the vaccine if you: Had anaphylaxis following a previous dose of an mRNA COVID-19 vaccine or any of its components. The study authored by Wolfson, Blumenthal and colleagues offers guidance to allergists and patients. These include injection site pain, fatigue, headache, muscle or joint pain, chills or vomiting. A day later, she had recovered and was discharged. There is no confirmation that PEG has triggered any of the mRNA vaccine reactions so far. Fluad, a vaccine for the prevention of seasonal influenza in adults 65 years of age and older, includes MF59, also an oil-in-water emulsion of squalene oil. And the CDC says the vaccines are safe and effective. Heplisav-B, a vaccine for the prevention of infection caused hepatitis B virus in adults 18 years of age and older, includes CpG 1018, an adjuvant based on synthetic DNA sequences. Because of that, "lipids are unique to this type of vaccine",Jamie Alan, PhD, an associate professor of pharmacology and toxicology at Michigan State University in East Lansing, Mich., toldHealth. Sodium chloride is just salt, Dr. Adalja pointed out. The information in this story is accurate as of press time. Kristie Reed, PharmD, oversees emergency, general medical, surgical, psychiatric care, and oncology medication as the pharmacy director of a community hospital. The risk of a severe case of coronavirus disease because of age or medical conditions. But mRNA vaccines work differently and contain no live virus.The CDC explainsthat these vaccines instead teach our cells how to make a protein or even just a piece of a protein that triggers an immune response. This leads the immune system to produce antibodies against the virus, which will protect an inoculated person who gets exposed to the real virus. They can also remain in your body, helping fend off future illnesses by those same infections. This study provided additional scientific information confirming that the benefits of aluminum-containing vaccines administered during the first year of life outweigh any theoretical concerns about the potential effect of aluminum on infants. Suite 6-168 People have used sulfa-containing since 1936 to treat bacterial infections. In research, youre trying to control for all confounding variables that you can. After the mRNA vaccine prompts an immune response, your body will eliminate the protein and the mRNA. Check with your maternal care provider about any vaccine questions you have. The hospital emergency physician who treated her told a virtual press briefing (attended by AllergicLiving) that the woman had a red rash on her face and experienced shortness of breath and an elevated heart rate. Korin Miller is a freelance writer specializing in general wellness, sexual health and relationships, shopping, and lifestyle trends, with work appearing in Womens Health, Self, Prevention, Forbes, Daily Beast, and more. Last year's flu season was actually more mild than many pre-pandemic flu seasons. Because the vaccine is composed of mRNA, it cannot give someone the virus. We are using cookies to give you the best experience on our website. The studys aim was to find out whether people with allergies from foods to medications, insect stings or mast cell disorders were at any higher risk of a reaction to the mRNA vaccines than those without allergies. Antibiotics containing chemicals called sulfonamides can trigger a reaction if you have a sulfa allergy. Sulfa allergies and sulfite allergies are different. The amount of formaldehyde present in some vaccines is so small compared to the concentration that occurs naturally in the body that it does not pose a safety concern. Accessed Oct. 28, 2019. Both sulfa and sulfites can cause allergic reactions, but they are two separate allergies, and there is no link between them. Studies have shown that for a newborn of average weight of 6 - 8 pounds, the amount of formaldehyde in their body is 50-70 times higher than the upper amount that they could receive from a single dose of a vaccine or from vaccines administered over time. Read more about our fact-checking work here . On Dec. 24, 2020,a Boston doctorbecame the first to experience anaphylaxis to the Moderna vaccine. And sucrose, a form of sugar, is "usually used as a stabilizer," added Dr. Alan. health information, we will treat all of that information as protected health Forty-seven of the anaphylactic reactions in adults were to the Pfizer-BioNTech vaccine, or 4.7 cases for every 1 million people who got that shot. We put the polyethylene glycol (PEG) and soy allergy question to two experts: allergist and vaccine expertDr. James Baker, director of the Mary H. Weiser Food Allergy Center at the University of Michigan, and Dr. Kimberly Blumenthal, allergist and the safety officer for allergy at Massachusetts General. AMERICANS have been warned not to take the Pfizer Covid vaccine if they have "significant allergies" as Canada approved the jab. information submitted for this request. information and will only use or disclose that information as set forth in our notice of Those who have had allergic reactions to things such as food, latex, pollen and bee stings should still get the COVID-19 vaccine, Winokur said. Symptoms may include a rash and difficulty breathing. In a report released Jan. 6, the CDC says it only has confirmed 21 cases of severe allergic reaction out of the first 1.9 million coronavirus vaccine doses administered. Another was a 30-year-old woman who was allergic to bee stings. They are used to reduce bacterial growth in eggs during processing steps, because eggs are not sterile products. Its important to keep in mind the level of attention for the COVID-19 vaccine rollout. If you have known allergies and believe you experiencing symptoms of anaphylaxis, follow your emergency care plan: use your epinephrine auto-injector, then call 9-1-1. Can poor sleep impact your weight loss goals? If the test is positive, that person would not be a candidate for either of the mRNA vaccines. According to the Union health ministry, a total of 3 . The body continuously processes formaldehyde, both from what it makes on its own and from what it has been exposed to in the environment. If a person experiences any respiratory symptoms, such as wheezing, they may need a drug called a bronchodilator. Allergists are using laxatives to find out if patients have sensitivity to the COVID-19 vaccines. Health.com uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Quinolones, including Cipro and Levaquin. Centers for Disease Control and Prevention (CDC). Some Americans may need to avoid the COVID-19 vaccine for allergies to pharmaceuticals, those with food allergies have the green light to get the shot. 2004-2023 Healthline Media UK Ltd, Brighton, UK, a Red Ventures Company. She was given epinephrine. Sulfonamide allergies. The body naturally makes mRNA based on instructions from DNA, the body's genetic material. Health-care providers are required to report such adverse events. The other was a 46-year-old woman with allergies to hydrocodone and nuts, but no history of anaphylaxis. Factors the CDC says allergists and patients with a history of a vaccine/injectable severe reaction should consider include: *The CDC defines an immediate allergic reaction as one that involves symptoms such as widespread hives, swelling and respiratory distress (such as wheezing). The egg allergy question likely arises in part because of common misunderstanding about this allergy in relation to the flu shot and the MMR vaccine. Also, sulfa is different from sulfates and sulfur. The short answer is yes. MPL is a purified fat-like substance. Prior to licensure, as part of FDAs evaluation, FDA takes all of the ingredients of a vaccine into account, including the active ingredients as well as other substances. When the body breaks down formaldehyde, it does not distinguish between formaldehyde from vaccines and that which is naturally produced or environmental. Accessed Oct. 22, 2019. M6S 5A5. The FDA says this may or may not relate to mRNA vaccination, and will continue to be monitored. Hypersensitivity reactions to non beta-lactam antimicrobial agents, a statement of the WAO special committee on drug allergy. Some people, especially after the second vaccine, will get fevers, chills, and muscle aches. When your body encounters the protein, it creates antibodies. Are the mRNA vaccines safe for people with celiac disease? The makers of thePfizer-BioNTech vaccinemade the vaccine ingredients available to the public. On Dec. 15, 2020, a nurse in Alaska became the first American to have an anaphylactic reaction to the Pfizer-BioNTech coronavirus vaccine. People with anaphylaxis history should not take Pfizer COVID shot British regulator issues new guidance after adverse reactions in small number of people with previous allergies. The timing of administering the boosters change based on our growing understanding of the virus and the duration of protection from COVID-19 infection. Formaldehyde is also found in the environment and is present in different ways. Recap. As a result, small amounts of antibiotics may be present in some vaccines. It found only 66 cases of anaphylaxis among 17.5 million doses of the two vaccines administered. While sulfites occur naturally in foodstuffs, sulfa medications do not. A man receives the COVID-19 vaccine at a gymnasium on March 18, 2021 in Beijing, China. "Nothing too surprising there," said Dr. Matthew Heinz, a . The .gov means its official.Federal government websites often end in .gov or .mil. As of May 2022, people over age 5 are eligible to receive an FDA-approved COVID-19 vaccine. FRANKFURT, Ky. (OVR) More than 2.5 million people in Kentucky, Ohio and West Virginia have been vaccinated with at least one dose of the Moderna or Pfzier COVID-19 vaccines. Many medications contain sulfa, but allergic reactions to sulfa drugs are rare. Pfizer-biontech covid-19 vaccines. Vaccines contain proteins that resemble part of an infectious organism to create an immune response in your body, including antibodies. Shingrix, a. With Moderna, the CDC study authors said there were 19 confirmed reports of anaphylaxis, or 2.5 cases for every 1 million people. This means that every time you visit this website you will need to enable or disable cookies again. Always tell your doctor about your sensitivities to medication. Dr. Anna Wolfson, an allergist and drug allergy expert at Massachusetts General, explains that at the molecular level, PEG and polysorbate look structurally similar. Are the mRNA vaccines safe for people with egg allergy? People should note that there is a difference between sulfa and sulfite despite their similar names.

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