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Updated on August 7, 2022 7:30 pm
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Updated on August 7, 2022 7:30 pm
All countries
Updated on August 7, 2022 7:30 pm

Global Statistics

All countries
Updated on August 7, 2022 7:30 pm
All countries
Updated on August 7, 2022 7:30 pm
All countries
Updated on August 7, 2022 7:30 pm
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How To Prevent Side Effects From Covid Vaccine

How Well Do The Covid

Latest research on vaccine side effects, immune reaction and thrombosis risks | COVID-19 Special

Anyone who gets COVID-19 can become seriously ill or have long-term effects . The COVID-19 vaccines are the best way to protect yourself and others.

Research has shown the vaccines help:

  • reduce your risk of getting seriously ill or dying from COVID-19
  • reduce your risk of catching or spreading COVID-19
  • protect against COVID-19 variants

The 1st dose should give you some protection from 3 or 4 weeks after you’ve had it. But you need 2 doses for stronger and longer-lasting protection.

There is a chance you might still get or spread COVID-19 even if you have a vaccine, so it’s important to follow advice about how to avoid catching and spreading COVID-19.

The Biggest Thing You Can Do To Reduce Vaccine Side Effects Doctor Says

The lead-up to your vaccine is filled with eager anticipation for gaining some long-awaited immunity to COVID. The time after the vaccine, however, can include a little anxious anticipation of the possible reactions you might have to the shot. While side effects are inevitable for many peopleand a normal sign the vaccine is doing its jobthere are a few things you can do to reduce your discomfort. According to one doctor, there is a simple thing you should do before your vaccine that could help minimize your side effects. Read on to find out how to better prepare for your shot, and for more on vaccine reactions, discover The Common Vaccine Side Effect That No One Is Talking About, Experts Say.

Which Vaccine Will I Get

You cannot usually choose which vaccine you have. When you book, you’ll only be offered appointments for vaccines that are suitable for you.

Most people can have any of the COVID-19 vaccines, but some people are only offered certain vaccines.

For example:

  • if you’re pregnant or under 40 you’ll usually be offered appointments for the Pfizer/BioNTech or Moderna vaccines
  • if you’re under 18, you’ll only be offered the Pfizer/BioNTech vaccine

You should have the same vaccine for both doses, unless you had serious side effects after your 1st dose.

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Plan To Take Time Off Work After Your Second Dose

A recent CDC report examined side effects among more than 1.9 million Americans who’d received both doses of Pfizer’s or Moderna’s vaccines. Across the board, side effects were more numerous and severe after the second dose of either vaccine.

The one exception is if you’d have COVID-19 before: A small study from the Icahn School of Medicine at Mount Sinai found that vaccine side effects such as fatigue, headaches, and chills were more common after the first dose among people with preexisting immunity to the coronavirus than among people who’d never been infected.

In any case, medical experts said, plan to take time off work if you’re feeling run-down.

“Take the sick day because you will be less effective at the work you’re doing,” Nachman said.

If You Received A Booster Shot

List of Possible COVID

So far, reactions reported after getting a booster shot were similar to those after the two-dose or single-dose primary series. Fever, headache, fatigue and pain at the injection site were the most commonly reported side effects, and overall, most side effects were mild to moderate. However, as with the two-dose or single-dose primary series, serious side effects are rare, but may occur.

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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.

More information is available on the page about AstraZeneca side-effects. The website of the Dutch Medicines Agency also offers more information about AstraZeneca and .

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.

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Are Mrna Vaccines Harmful

Much of the concern seems to center on the suggestion that mRNA vaccines are potentially harmful, and the fact that they are a new drug means that we do not fully understand their impact yet. But there is little evidence to suggest that they can be harmful, scientists say.

It was worth noting that the mRNA vaccines that have been developed actually use a modified form of mRNA to reduce the risk of unwanted side effects, says professor of Immunology at the University of Bern in Switzerland, Prof. Martin Bachmann.

In an interview, he explained to MNT that: These are not normal RNA molecules theyre slightly modified. And the more you modify them, I guess the less toxic they will be, but then they may also be less effective at actually immunizing, so Im sure found some compromise there between safety and the efficacy.

If the body doesnt recognize it, then it wont be toxic, he pointed out. So if youve modified your RNA and the body does not recognize the mRNA, youre more likely to have essentially no side effects except the very rare ones. But if you completely modify the RNA, you probably wont have an effective vaccine.

Dr. Shafran concurred, saying that the COVID-19 vaccine is irrevocable and thats not a bad thing.

He also explained:

How Can You Care For Yourself After Getting The Vaccine

Tips to Avoid, Lessen COVID-19 Vaccine Side Effects | NewsNOW from FOX
  • If you have a sore arm or a fever after getting the COVID-19 vaccine, you can take an over-the-counter pain medicine, such as acetaminophen or ibuprofen . Read and follow all instructions on the label. Do not give aspirin to anyone younger than 18. It has been linked to Reye syndrome, a serious illness.
  • Put ice or a cold pack on the sore area for 10 to 20 minutes at a time. Put a thin cloth between the ice and your skin.
  • If you have side effects, such as a fever, be sure to get enough rest and drink plenty of fluids.

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What Is A Yellow Card

The Yellow Card scheme is a mechanism by which anybody can voluntarily report any suspected adverse reactions or side effects to the vaccine. It is very important to note that a Yellow Card report does not necessarily mean the vaccine caused that reaction or event. We ask for any suspicions to be reported, even if the reporter isnt sure if it was caused by the vaccine. Reports to the scheme are known as suspected adverse drug reactions .

Many suspected ADRs reported on a Yellow Card do not have any relation to the vaccine or medicine and it is often coincidental that symptoms occurred around the same time as vaccination. The reports are continually reviewed to detect possible new side effects that may require regulatory action, and to differentiate these from things that would have happened regardless of the vaccine or medicine being administered, for instance due to underlying or undiagnosed illness.

It is therefore important that the suspected ADRs described in this report are not interpreted as being proven side effects of COVID-19 vaccines. A list of the possible side effects of COVID-19 Pfizer/BioNTech Vaccine, COVID-19 Vaccine AstraZeneca and COVID-19 Vaccine Moderna are provided in the product information document for healthcare professionals and the UK recipient information. These can also be found on the Coronavirus Yellow Card reporting site.

Fever After The Coronavirus Vaccine

Its quite common to develop a fever after a vaccination. This normally happens within 48 hours of the vaccination and usually goes away within 48 hours.

You do not need to self-isolate or book a test unless you have other coronavirus symptoms or:

  • you have been told by NHS Test and Protect, or your occupational health team, that you are a close contact of someone who has tested positive for coronavirus
  • you live with someone who has recently tested positive for coronavirus
  • you live with someone who has symptoms of coronavirus

If the fever starts more than 48 hours after the vaccination or lasts longer than 48 hours, you should self-isolate and book a test.

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How Do Vaccines Work

Vaccines help people develop immunity to a virus or other germ. A vaccine introduces a less harmful part of that germ or something created to look or behave like it into a persons body. The bodys immune system develops antibodies that fight that particular germ and keep the person from getting sick from it. Later, if the person encounters that germ again, their immune system can recognize it and remember how to fight it off.

How Quickly Does The Covid


“The booster doesn’t work immediately,” Milstone stressed. While research is ongoing, early data suggests that immunity is boosted in one to two weeks. It’s very possible especially during the Thanksgiving and winter holiday season to get a booster and then get a COVID-19 infection or another seasonal illness quickly afterward.

So, if you feel feverish and achey for a day, that’s probably due to the booster. But if, two or three days after the vaccine, you still have those symptoms or you develop other signs of the infection such as a cough, “that would be a good reason to check in with your doctor and make sure that you don’t actually have COVID,” Milstone said.

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Who Should Not Take Paxlovid

As for the report published by the United States National Institutes of Health, People who are struggling with kidney failure should avoid taking medicine. Paxlovid is not recommended for patients who have eGFR of < 30mL/min. Those people should completely avoid the medication as the dose for these patients has not been determined yet.

At the same time, if the patient has a filtration rate of < 30mL/min to < 60mL/min, should reduce the dose of Nirmatrelvir to 150mg with ritonavir 100 mg.

Apart from that, Paxlovid is also not recommended for patients suffering from severe liver diseases. You should tell your doctor about any liver problem you currently have, as it can be a deadly combination.

During liver failure, you might experience loss of appetite and unexpected weight loss at the same time. Apart from that, the yellow color of your eyes and dark-colored urine is also directly related to liver diseases. You should try to avoid taking Paxlovid.

If you start seeing the symptoms after taking the medication, you should consult with your doctor as soon as possible. These are not common side effects of taking Paxlovid.

Kindly remember the above-given side effects are not a complete list. There could be 100 different side effects that have not been covered by us yet. The medication is currently under study as it has not been given full approval by the United States Food and Drug Administration.

Possible Side Effects After Booster Shot

Reactions reported after getting a Pfizer-BioNTech booster shot were like those after the initial two doses . Overall, most side effects were mild to moderate. However, as with the primary series, serious side effects are rare, but may occur.

Learn more about the safety of COVID-19 vaccines and understanding adverse events and side effects.

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What Do The Side Effects Mean

If you get side effects, they are a good sign they indicate that the vaccine is working by triggering the immune system.

When you get vaccinated, your immune system recognizes something as being foreign. The immune system automatically launches a small-scale attack against it. This process teaches your immune cells to recognize and respond to an invader. Thats why you might experience some side effects. Think of it this way: The bodys response to the vaccine is like a training mission for the real fight.

Once youre fully vaccinated, if you were infected by the virus causing COVID-19, your immune system would be ready to launch an even larger and more powerful attack to protect you.

If you dont experience any side effects, that doesnt mean that the vaccine didnt work. In the vaccine clinical trials, more than half of people didnt experience any side effects but we still know that the vaccine was effective in those people.

When To Be Tested For Covid

Understanding COVID-19 vaccine side effects, why second dose could feel worse

The following symptoms suggest COVID-19 infection and are not common vaccine side effects

  • New loss of smell or taste
  • Cough or shortness of breath
  • Congestion/sore throat/runny nose/conjunctivitis
  • Nausea/vomiting or diarrhea.

If you have one or more of these symptoms, stay at home, and call the Call Center or your regular clinician to schedule a COVID test. If you do have a positive COVID-19 test between your first and second doses of COVID-19 vaccine, you should wait 10 days from when you first tested positive and be fully recovered before getting your second dose. You should still get the second dose.

You must continue to follow the advice of public health officials whether you are vaccinated or not: Wear your mask in public, ensure hand hygiene, and practice social distancing.

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Rare Reactions That Have Been Reported

As with all vaccines, there’s a very small chance that there will be a serious side effect. Most side effects are reported within the first 42 days following immunization. All side effect reports, including the rare reactions below, continue to be monitored closely by:

  • Health Canada
  • the Public Health Agency of Canada
  • provincial and territorial health authorities
  • the manufacturers

Health Canada is:

  • continuing to monitor emerging safety information about the vaccines in Canada and internationally
  • working closely with the manufacturers to ensure the labels on vaccines reflect relevant information, such as:
  • directions for use
  • warnings about side effects when used alone or when used with other products

If I Get A Coronavirus Vaccination Do I Still Have To Wear A Mask Physical Distance

The CDC continues to monitor the spread of COVID-19 and makes recommendations for wearing face masks, both for those who are fully vaccinated as well as those who are not fully vaccinated.

The CDC also recommends that masks and physical distancing are required when going to the doctors office, hospitals or long-term care facilities, including all Johns Hopkins hospitals, care centers and offices.

Johns Hopkins Medicines current mask safety guidelines have not changed, and we still require all individuals to wear masks inside all of our facilities.

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Does Johns Hopkins Medicine Recommend That I Get A Covid

Yes, we recommend that everyone who is eligible get vaccinated with one of the three currently authorized COVID-19 vaccines. Johns Hopkins Medicine is administering all three vaccines: Pfizer-BioNTech, Moderna and Johnson & Johnson. We view all three as highly effective in preventing serious disease, hospitalization and death from COVID-19 , and we believe that their benefits outweigh their risks.

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Should I Get An Antibody Test After The Vaccine To Make Sure Its Working


Antibody testing is not currently recommended check someones immunity to COVID-19 following either the Pfizer-BioNTech or Moderna vaccines. The COVID-19 antibody test used at MSK detects the immune response after being infected by COVID-19. It does not measure immunity that results from the vaccine. Thats why it should not be routinely ordered to assess vaccine response.

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Waiting Time After Your Coronavirus Vaccination

Due to the Omicron variant, the adult booster programme is being rolled out faster.

Given the very low rate of serious allergic reactions , the 15-minute wait has been reduced to 5 minutes, as long as you feel okay. This change has been advised by the 4 UK Chief Medical Officers. It’s also supported by the Medicines Healthcare products Regulatory Agency and the Joint Committee on Vaccination and Immunisation .

Make sure you tell the vaccination staff if you:

  • have a history of allergies, particularly to other vaccines
  • if you had an immediate reaction after your previous doses
  • if you have previously fainted following vaccination

In these circumstances, you may be advised to stay for 15 minutes. A family history of allergies is not a risk factor.

You must not drive for 15 minutes after the vaccine because of the risk of fainting.

If you experience symptoms of an allergic reaction, call out for help and/or phone 999 immediately . Symptoms usually happen within 15 minutes of vaccination.

You should look out for the following allergic symptoms:

  • persistent cough
  • swollen tongue causing difficulty swallowing
  • difficult or noisy breathing
  • wheezing
  • feeling lightheaded or prolonged faint
  • clammy skin

More information is available in the Waiting after the coronavirus vaccination leaflet.

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