Throughout The Rest Of Your Body:
Anyone who has had a severe allergic reaction after getting a mRNA COVID-19 vaccine , should not get another dose of either of the mRNA COVID-19 vaccines. Anyone who has had a severe allergic reaction after receiving Johnson & Johnsons Janssen COVID-19 vaccine, should not receive another dose of that vaccine.
When Youre Likely To Experience A Side Effect
Most side effects show within a day or two after being vaccinated.
|What you may feel||What can help||When this could start|
Pain at the injection site, a headache and feeling tired and fatigued. These are the most commonly reported side effects.
Place a cold, wet cloth, or ice pack on the injection site for a short time.
Do not rub or massage the injection site.
Within 6 to 24 hours
Muscle aches, feeling generally unwell, chills, fever, joint pain and nausea may also occur.
Rest and drink plenty of fluids
Paracetamol or ibuprofen can be taken, follow the manufacturers instructions.
Seek advice from your health professional if your symptoms worsen.
Within 6 to 48 hours
|New onset chest pain, racing heart, or shortness of breath||Speak to your health professional promptly if you develop any of these symptoms.||Within 14 days|
Myocarditis And The Covid
Since April 2021, some people have developed myocarditis and pericarditis after receiving the Pfizer-BioNTech or Moderna coronavirus vaccines in the United States, according to the U.S. Centers for Disease Control and Prevention . The problem occurs more often in adolescents and young adults, and in males.
Considering the hundreds of millions of COVID-19 vaccine doses that have been administered, these reports are very rare. The vast majority of myocarditis or pericarditis cases are mild and resolve quickly. Myocarditis is more likely to occur as a result of COVID-19 infection than as a side effect of the vaccines.
Seek medical attention right away if, within a few days of receiving the second injection of an mRNA COVID-19 vaccination , you or your child experience:
- Chest pain
- Feelings of having a fast-beating, fluttering or pounding heartbeat
COVID can cause heart problems, too
Having COVID-19 can also cause heart problems. One study published by the CDC reports that from March 2020 to January 2021, patients with COVID-19 had nearly 16 times the risk for myocarditis compared with patients who did not have COVID-19.
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Common Side Effects Of Covid
Like any vaccine, COVID-19 vaccines can cause side effects, most of which are mild or moderate and go away within a few days on their own. As shown in the results of clinical trials, more serious or long-lasting side effects are possible. Vaccines are continually monitored to detect adverse events.
Reported side effects of COVID-19 vaccines have mostly been mild to moderate and have lasted no longer thana few days. Typical side effects include pain at the injection site, fever, fatigue, headache, muscle pain, chills and diarrhoea. The chances of any of these side effects occurring after vaccination differ according to the specific vaccine.
COVID-19 vaccines protect against the SARS-CoV-2 virus only, so its still important to keep yourself healthy and well.
Very Common Side Effects
For a full list of ingredients, read the patient information leaflet for the Pfizer/BioNTech COVID-19 vaccine .
The Moderna COVID-19 vaccine is only used in adults aged 30 and over in Ireland.
If you are under 30 and had the Moderna vaccine, you should get the Pfizer/BioNTech vaccine for any other doses you need.
Moderna is not recommended if you have had a severe allergic reaction to:
- any of the ingredients in this vaccine – including polyethylene glycol or PEG
- Trometamol – an ingredient in contrast dyes used for MRI scans
You should also not get this vaccine if you:
- have been told by a doctor that you should not get this vaccine or the Pfizer/BioNTech COVID-19 vaccine – they are both mRNA vaccines
- had myocarditis after a previous dose of this vaccine or the Pfizer/BioNTech COVID-19 vaccine
Talk to your doctor before getting this vaccine if you:
- have had a severe allergic reaction in the past, including to any other vaccine or medication
- had pericarditis after a previous dose of this vaccine or the Pfizer/BioNtech COVID-19 vaccine
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The Vaccine Development Process From Clinical Trials To Ongoing Monitoring Helps To Uncover And Understand Side Effects
Clinical trials are a key part of vaccine development and involve evaluating use in tens of thousands of study participants. All of the COVID-19 vaccines went through this rigorous process before authorization.
In reviewing results from the trials, the federal Food and Drug Administration must determine that the known and potential benefits outweigh the known and potential risks of the vaccine.
After vaccines are authorized and in use by the public, public health officials continue monitoring the data as an additional safety measure. Manufacturers must have a plan to report follow-up data, including any events such as hospitalizations and deaths, and they must continue research to generate more data on safety and efficacy. Learn more about FDA emergency use authorization.
Do I Need To Get Tested Following Vaccination If I Develop Symptoms
Some side effects from COVID-19 vaccination, such as fever, might be similar to symptoms of COVID-19 itself. However, neither of the vaccines contain any live SARS-CoV-2 virus and cant cause COVID-19.
You may not need to get a COVID-19 test or isolate:
- if you develop general symptoms such as fever, headache or tiredness in the first 2 days after vaccination, and
- if you are sure that you dont have any respiratory symptoms
However, you should check the current guidelines in your state or territory for the most up-to-date information. This advice may change in the event of a COVID-19 outbreak in your local area.
You may still need to get a COVID-19 test if you meet other criteria for example, if you are a close contact of a known COVID-19 case.
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Helpful Tips To Relieve Side Effects
Talk to a doctor about taking over-the-counter medicine, such as ibuprofen, acetaminophen, aspirin , or antihistamines for any pain and discomfort experienced after getting vaccinated.
People can take these medications to relieve side effects after vaccination if they have no other medical reasons that prevent them from taking these medications normally. Ask your childs healthcare provider for advice on using a non-aspirin pain reliever and other steps you can take at home to comfort your child after vaccination.
It is not recommended to take these medicines before vaccination for the purpose of trying to prevent side effects.
Do The Vaccine Side Effects Mimic Covid
Dr. Scheraga notes that there are some overlapping features between the side effects and the symptoms of COVID-19. Specifically, fever and muscle aches are some of the general side effects that mirror COVID-19 symptoms.
Its important to keep an eye on the side effects you experience because its possible that these symptoms could be a result of COVID-19.
Its possible that if you contract the virus a few days before you receive your first dose, those symptoms could be indicative of COVID-19 infection instead of vaccine side effects, Dr. Scheraga says.
But, she adds, there are a few ways to tell if its just the side effects or something more serious. Most times, the side effects are mild and usually fade within 24 hours. You shouldnt feel prolonged effects from the vaccine itself.
Everyones reaction will be on a case-by-case basis. If you find those symptoms worsening or lingering longer than a day or two, you should contact your healthcare provider. Theyll be able to direct you on the best next steps, including, potentially, a COVID-19 test.
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Is There Risk Of Allergic Reaction From Covid
According to the CDC, anyone who has a known severe allergy to any of the vaccine ingredients should not receive that vaccine.
The CDC says people with allergies to certain foods, insects, latex and other common allergens can safely receive the COVID-19 vaccine. Those with a history of severe allergic reaction to injectables or other vaccines should discuss the vaccination with their doctor, who can evaluate and assess their risk.
What Can You Do If You Experience Side Effects
The CDC recommends people talk to their doctors about taking over-the-counter medicines like ibuprofen, acetaminophen, aspirin, or antihistamines, for any pain and discomfort after getting vaccinated.
“You can take these medications to relieve post-vaccination side effects if you have no other medical reasons that prevent you from taking these medications normally,” the CDC states. “It is not recommended you take these medicines before vaccination for the purpose of trying to prevent side effects.”
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Very Rare And Serious Side
In very rare cases, more serious side-effects may also occur. These symptoms are very uncommon. In the context of the AstraZeneca and Janssen vaccines, this can involve a combination of blood clots with low levels of blood platelets . This side-effect is referred to as thrombosis with thrombocytopenia syndrome .
Since the risk of this rare side-effect is very low, these vaccines are deployed for some specific groups. The AstraZeneca vaccine is only given to people born in 1960 or before. The Health Council of the Netherlands advised using the Janssen vaccine in situations in which the advantage of a single vaccination is very significant.
It is important to contact medical professionals immediately if you develop these symptoms after vaccination with Janssen or AstraZeneca:
- shortness of breath
- pain in the chest or abdomen
- swelling or a cold feeling in an arm or leg
- severe or worsening headache or blurred vision
- persistent bruising
- multiple tiny blood spots: red or purple dots or blisters under the skin.
If these symptoms do occur, they are usually seen within three weeks after vaccination.
Women Experience More Side Effects
In a February study that looked at the data from the first 13.7 million COVID-19 vaccine recipients, the Centers for Disease Control and Prevention found that nearly 80 percent of the people reporting reactions were female, even though only 61.2 percent of the injections had been given to women. In a similar vein, the CDC reported that all anaphylactic reactions to the Moderna shot have been in women 44 of the 47 people whove had these reactions to the Pfizer injection were female.
The majority of people who have experienced the severe blood clotting issues with the J & J vaccine, and also the AstraZeneca vaccine in Europe and the United Kingdom, have been women. There has been speculation about hormones playing a rolewhich is always the first culprit thats looked at when you see a major sex difference, says Penns Wherry.
Several other factors may also contribute to this gender imbalance. Women also seem to have a more robust immune system, both in their innate responses and in their adaptive immune reactions. Females mount a stronger antibody response than males but its a double-edged sword because this is why women have more auto immune disease than men, says Shresta of the La Jolla Institute for Immunology.
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Pain At The Injection Site
Expect to have a little localized arm pain or tenderness at the site of injection, says Dr. Mullane. You may also notice some redness or swelling where the needle went into your skin, but it will dissipate. About 70% to 80% of people feel arm pain the day of the shot, per CDC data. If it bothers you, you can soothe the area with a cool washcloth, the CDC advises.
How Do I Report Vaccine Side Effects
You can report suspected side effects to your vaccination provider or other healthcare professional. They will then make a formal report on your behalf to your state or territory health department or directly to the Therapeutic Goods Administration .
If you would prefer to report side effects yourself, visit the TGA website and follow the directions here: tga.gov.au/reporting-problems. By reporting side effects, you can help provide more information on the safety of these vaccines.
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Common Side Effects Of Covid Vaccines
After getting vaccinated for COVID-19, you might experience some temporary symptoms similar to those you might notice when you get a flu shot, such as a sore, swollen arm where you got the shot. You might run a fever and experience body aches, headaches and tiredness for a day or two. Chills and swollen lymph nodes can also occur.
These symptoms do not mean you are sick. They signal that your immune system is responding to the shot and building up protection against the coronavirus.
Side Effects Of Covid
This article is part of a series of explainers on vaccine development and distribution. Learn more about vaccines from how they work and how theyre made to ensuring safety and equitable access in WHOs Vaccines Explained series.
COVID-19 vaccines are safe, and getting vaccinated will help protect you against developing severe COVID-19 disease and dying from COVID-19. You may experience some mild side effects after getting vaccinated, which are signs that your body is building protection.
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What If I Experience Swelling Or Tenderness Away From Where I Was Injected
Some patients who receive either the Pfizer-BioNTech or Moderna vaccines may experience some swelling or tenderness in their lymph nodes. It is also possible that this swelling will show up on imaging tests and could be mistaken for progression of certain cancers primarily breast, head and neck, melanoma, and lymphoma.
This vaccine side effect is more common after the second dose, usually occurs within two to four days after the vaccination, and can last for an average of 10 days.
On imaging tests, the lymph node enlargement may be detected for a longer period. For these reasons, we recommend:
- If you develop this symptom after youre vaccinated, you should speak to your doctor. Most of the time, they will recommend that you wait at least four weeks before getting further tests, to give time for the swelling to disappear.
- You should schedule your COVID-19 vaccination after any routine imaging. If youve already had the vaccine, then we recommend you wait six weeks for any routine breast screenings, including mammography and breast MRI.
- If youve had cancer, you should ask for your COVID-19 vaccine to be administered on the opposite side of your cancer diagnosis if possible.
- If you have any discomfort from the swelling, you can use a warm compress. Acetaminophen or non-steroidal anti-inflammatory drugs may be taken to ease the discomfort.
What You Need To Know
- COVID-19 vaccines are safe and effective.
- CDC recommends everyone ages 5 years and older get vaccinated as soon as possible to protect against COVID-19 and its potentially severe complications. CDC has updated its recommendation for COVID-19 vaccines with a preference for mRNA vaccines .
- Millions of people in the United States have received COVID-19 vaccines under the most intense safety monitoring program in U.S. history.
- CDC, the U.S. Food and Drug Administration , and other federal agencies continue to monitor the safety of COVID-19 vaccines.
- Adverse events described on this page have been reported to the Vaccine Adverse Event Reporting System external icon.
- VAERS accepts reports of any adverse event following vaccination.
Serious adverse events after COVID-19 vaccination are rare but may occur.
CDC is providing timely updates on the following serious adverse events of interest:
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But What If You Had No Noticeable Reaction To The Vaccine Does That Mean You Aren’t Fully Protected
Dr. Marcelin says a lack of side effects doesn’t mean a lack of protection. “We talk a lot about how this is your immune system working, and it’s showing you that it’s working. And that is true, but if a person does not experience those immune side effects or immune symptoms, that doesn’t mean that their immune system isn’t working.”
“How I like to put is that there are different degrees of how loud our immune systems are. Some people’s immune systems, like mine, are just really loud, obnoxious even. And then others just go along quietly, do their job and don’t make a fuss. And they’re doing what they’re supposed to, but they’re not going to make a fuss about it. So if you don’t experience some of these obnoxious immune effects, don’t worry about whether or not you got a good vaccine, or is it working, or is something wrong with your body. It has nothing to do with that. It’s just different degrees of loudness.”
Cutaneous Small Vessel Vasculitis
A very small number of cases of cutaneous small vessel vasculitis have occurred in people after this vaccine. In most cases, symptoms get better with supportive care.
The official name of AstraZeneca’s COVID-19 vaccine is ‘Vaxzevria’. But most people call it ‘AstraZeneca’.
This vaccine is not available in Ireland at this time.
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Who Is Eligible For A Covid
If you received two Pfizer or Moderna COVID-19 vaccines six or more months ago, youre eligible for a booster shot if you are:
- 65 or older
- 18 or older and you have an underlying medical condition
- 18 or older and you live or work in a high-risk setting
If you are 18 or older and you received a Johnson & Johnson COVID-19 two or more months ago, you are also eligible for a booster shot.
Regardless of which vaccine you had originally, you can receive a booster with any of the three authorized vaccines.