Do COVID-19 mRNA vaccines have long-term effects?

The Pfizer and Moderna vaccines were created using messenger RNA (or mRNA) technology, which has been used for about 10 years in cancer treatment, with no long-term effects detected.
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Are long-term side effects possible with COVID-19 vaccination?


Serious side effects that could cause a long-term health problem are extremely unusual following any vaccination, including COVID-19 vaccination. The benefits of COVID-19 vaccination outweigh the known and potential risks.

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Do mRNA Pfizer and BionTech vaccines largely prevent severe disease from the COVID-19 Omicron variants?

Pfizer Inc. and BioNTechs Covid-19 vaccine appears to largely prevent severe disease from the coronavirus omicron variants sublineages BA. 4 and BA.
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Are there any safety concerns concerning mRNA technology of the Pfizer-BioNTech COVID-19 Vaccine?

FDA does not have specific safety concerns with a vaccine that utilizes this technology.

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Do mRNA COVID-19 vaccines cause heart inflammation?


These cases typically occur in male adolescents and young adults after the second dose, and within a week of vaccination. It is important to seek medical care if symptomatic (chest pain, shortness of breath, having a fast beating, fluttering, or pounding heart).

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New Study: Moderna VS. Pfizer Vs. Novavax vs. Johnson



What are the average ages of people who had myocarditis after mRNA-based COVID-19 vaccination during the first 8 months of 2021?

Of the 1626 reports that met the CDCs case definition for myocarditis, 1195 (73%) were younger than 30 years of age, 543 (33%) were younger than 18 years of age, and the median age was 21 years (IQR, 16-31 years) (Figure 1).
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Can I get myocarditis if I have COVID-19?


Myocarditis is uncommon among patients with and without COVID-19; however, COVID-19 is a strong and significant risk factor for myocarditis, with risk varying by age group.

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Are mRNA COVID-19 vaccines safe?


mRNA vaccines are safe and effective.
mRNA vaccines have been held to the same rigorous safety and effectiveness standards as all other types of vaccines in the United States.

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Are severe reactions to mRNA COVID-19 vaccines common?


We found that reported reactions to mRNA vaccination were mostly mild in severity and transient in duration, and most reports were non-serious. Reactions and health impacts were reported more frequently in female than in male recipients, and in individuals younger than 65 years than in older individuals.

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Is it safe to take the Moderna, Pfizer-BioNTech, or J&J COVID-19 vaccine during pregnancy?

No safety concerns were found in animal studies: Studies in animals receiving a Moderna, Pfizer-BioNTech, or Johnson & Johnson (J&J)/Janssen COVID-19 vaccine before or during pregnancy found no safety concerns in pregnant animals or their babies.
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Does the COVID-19 booster vaccine protect against the Omicron variant?


In adult populations, the protection conferred by two vaccine doses against Covid-19 wanes (more against milder infection than against severe disease) and is lower for omicron than for delta. However, a booster dose increases protection, including protection against omicron.

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Is the COVID-19 Omicron variant more transmissible than previous variants?

The good news was that the new variant caused less severe illness and death than Delta. But it was also highly transmissible—more contagious than any variant that came before it.
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Does the COVID-19 booster protect you from the omicron variant?


A COVID-19 booster shot will provide strong and broad antibody protection against the range of omicron sublineage variants of the SARS-CoV-2 virus in circulation, two new studies using serum from human blood samples suggest.

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What are the most common side effects of the COVID-19 vaccine?


Fatigue and pain at the injection site were the most commonly reported side effects—and overall, most symptoms were mild and temporary. As with the two-dose primary series, serious side effects are rare, but may occur.

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What are the possible side effects of the Moderna and Pfizer COVID-19 vaccines?


Possible side effects: Pain, redness, or swelling at the site where the shot was administered, and/or tiredness, headache, muscle pain, chills, fever, or nausea throughout the rest of the body. If these side effects occur, they should go away in a few days. A few side effects are serious, but rare.

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What are the common side effects of the Moderna COVID-19 booster vaccine?


The most commonly reported side effects by individuals who received a booster dose of the Moderna COVID-19 Vaccine after completion of a two-dose primary series were pain, redness and swelling at the injection site, as well as fatigue, headache, muscle or joint pain and chills.

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What are some rare severe allergic reactions to mRNA COVID-19 vaccines?

“Overall, severe allergic reactions to COVID-19 mRNA vaccines, including life-threatening anaphylaxis reactions such as low blood pressure and difficulty breathing, are rare, on the order of five cases per million vaccine doses administered,” noted Dr. Guerrerio.
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Should I be concerned about the potential adverse reactions of COVID-19 vaccines?


The known risks of COVID-19 illness and its related, possibly severe complications, such as long-term health problems, hospitalization and even death, far outweigh the potential risks of having a rare adverse reaction to vaccination like myocarditis or blood clots.

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Can the Moderna COVID-19 vaccine cause allergic reactions?

There is a remote chance that the Moderna COVID-19 Vaccine could cause a severe allergic
reaction. A severe allergic reaction would usually occur within a few minutes to one hour after
getting a dose of the Moderna COVID-19 Vaccine. For this reason, your vaccination provider
may ask you to stay at the place where you received your vaccine for monitoring after
vaccination. Signs of a severe allergic reaction can include:
• Difficulty breathing
• Swelling of your face and throat
• A fast heartbeat
• A bad rash all over your body
• Dizziness and weakness

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Are the COVID-19 vaccines safe?


All currently approved or authorized COVID-19 vaccines are safe and effective and reduce your risk of severe illness. Vaccination can reduce the spread of disease, which helps protect those who get vaccinated and the people around them.

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What COVID-19 vaccines are using mRNA technology?


The vaccines made by Pfizer-BioNTech and Moderna use mRNA to fight COVID-19.

When these vaccines were rolled out, it was the first time mRNA was used on humans in vaccine technology. While the concept is new to the public, the research has been around since the early 1990s. What are mRNA Vaccines? 2/11

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Will a COVID-19 vaccine alter my DNA?

No. COVID-19 mRNA vaccines do not change or interact with your DNA in any way.
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Can COVID-19 vaccine cause myocarditis?

Myocarditis is a rare adverse event associated with receipt of COVID-19 mRNA vaccines; the overall reporting rates of myocarditis following COVID-19 mRNA vaccination were highest among males aged <18 years (5).

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Can COVID-19 cause a myocarditis in rare cases?

COVID-19 can cause myocarditis, which is an inflammation of the heart muscle. This condition should be fully resolved before a return to sports activities. Any symptoms of chest pain, shortness of breath, lightheadedness, fainting or heart palpitations could indicate myocarditis.
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Can COVID-19 cause heart inflammation?


Viruses are a common cause of heart inflammation – known as myocarditis – and the coronavirus is no different. The Centers for Disease Control and Prevention reported in September research showing patients with COVID-19 had nearly 16 times the risk of myocarditis compared with patients without COVID-19.

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