Why Do People Get Sick After Second Covid Vaccine

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Q: Are The Side Effects Worse If Youve Already Had Covid

Why feeling bad after your second COVID-19 vaccine dose may be a good sign

Research and anecdotal reports suggest that people with a previously diagnosed Covid-19 infection may have a stronger reaction and more side effects after their first dose of vaccine compared to those who were never infected with the virus. A strong reaction to your first dose of vaccine also might be a sign that you were previously infected, even if you werent aware of it.

If you previously tested positive for Covid-19 or had a positive antibody blood test, be prepared for a stronger reaction to your first dose, and consider scheduling a few days off work just in case. Not only will it be more comfortable to stay home and recover in bed, the vaccine side effects can resemble the symptoms of Covid-19, and your co-workers wont want to be near you anyway.

Are Side Effects A Sign Of A Strong Immune System

While being stuck in bed for a day with a headache and fever is a sign that the vaccine is doing its job to trigger an immune response from your body, not experiencing any symptoms doesn’t mean the opposite, Dr Quinn said.

“We have no direct correlation between how many symptoms someone gets and the strength of the body’s immune response,” Dr Cheng said.

Who’s Eligible And How To Book

All vaccines approved for children require 2 doses at least 8 weeks apart to be fully protected. Minors under 18 require verbal or written consent from a parent or guardian to be vaccinated.

Children 12 and older

  • The children’s dose is 1/3 of the regular vaccine .
  • It is 90.7% effective in preventing illness and no serious side effects were identified.
  • Children are recommended to wait at least 14 days between the COVID-19 vaccine and the seasonal flu vaccine. Routine school immunizations can continue as scheduled.
  • Children under 5

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    Why Is A Booster Vaccination Important

    The COVID-19 vaccines licensed in Germany provide effective protection against severe illness. However, studies show that vaccination protection decreases over time and that the immune response is weaker in those who are older or have pre-existing conditions, for example.

    A booster vaccination significantly increases protection. The body makes more antibodies, allowing it to protect itself more effectively against the virus. The booster vaccination enhances the immune system hence the name. A booster of his kind is necessary in view of the increasing spread of the very contagious Omicron variant in Germany: both for individual protection and to prevent overloading of the health system.

    Can I Treat The Side Effects

    Why does COVID immunity last longer for some people

    If you have pain or discomfort after receiving your vaccination, talk to your doctor about taking an over-the-counter medicine, such as ibuprofen or acetaminophen .

    To reduce pain and discomfort on your arm:

    • Apply a clean, cool, wet washcloth over the area.
    • Use or exercise your arm.

    In most cases, discomfort from fever or pain is normal. Contact your doctor or healthcare provider:

    • If the redness or tenderness where you got the shot increases after 24 hours.
    • If your side effects are worrying you or do not seem to be going away after a few days.

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    Update Or Correct Your Vaccine Record

    Incorrect information on vaccine record

  • If your vaccine record has missing or incorrect information, consult the tips on our Covid Records Helpdesk.
  • You will need to get a new vaccine record every time you get another dose.
  • Vaccinated in Alberta without personal health number

    • If you were vaccinated in Alberta but don’t have an Alberta Personal Health Number, call 811 to get a vaccine record with QR code mailed to you.
    • If you become eligible for an Alberta Personal Health Number, you can use it to access your vaccine record online at alberta.ca/CovidRecords.

    Alberta residents vaccinated outside Alberta

    • If you or your children under 18 were partially or fully vaccinated outside of Alberta, update your health records by submitting your digital out-of-province/country immunization records online at ahs.ca/vaccineregistry.
    • Submitted records will be reviewed by AHS:
    • If more information is required to validate your record, AHS will contact you.
    • If your record cannot be validated, a letter will be sent. Book an appointment to begin or complete a valid COVID-19 vaccination series.
  • Verified information will be available on alberta.ca/CovidRecords in 2 to 3 weeks.
  • New to Alberta

    • If you recently moved to Alberta, use your provincial vaccine record with a QR code or out-of-country vaccine record.
    • New residents who were not vaccinated in Alberta cannot get an Alberta-issued vaccine record.

    Update records in another province or country

    The Coronavirus Pandemic: Key Things To Know

    Staying safe.Worried about spreading Covid? Keep yourself and others safe by following some basic guidance on when to test and how to use at-home virus tests . Here is what to do if you test positive for the coronavirus.

    During the Moderna trial, about 26 percent of people took acetaminophen to relieve side effects, and the overall efficacy of the vaccine still was 94 percent.

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    Q: I Didnt Have Any Side Effects Does That Mean My Immune System Didnt Respond And The Vaccine Isnt Working

    Side effects get all the attention, but if you look at the data from vaccine clinical trials and the real world, youll see that many people dont experience any side effects beyond a sore arm. In the Pfizer vaccine trials, about one out of four patients reported no side effects. In the Moderna trials, 57 percent of patients reported side effects after the first dose that jumped to 82 percent after the second dose, which means almost one in five patients reported no reaction after the second shot.

    A lack of side effects does not mean the vaccine isnt working, said Dr. Paul Offit, a professor at the University of Pennsylvania and a member of the Food and Drug Administrations vaccine advisory panel. Dr. Offit noted that during the vaccine trials, a significant number of people didnt report side effects, and yet the trials showed 95 percent efficacy. That proves you dont have to have side effects in order to be protected, he said.

    Nobody really knows why some people have a lot of side effects and others have none. We do know that younger people mount stronger immune responses to vaccines than older people, whose immune systems get weaker with age. Women typically have stronger immune responses than men. But again, these differences dont mean that you arent protected if you dont feel much after getting the shot.

    Why Boosted Americans Seem To Be Getting More Covid

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

    As COVID-19 cases began to accelerate again this spring, federal data suggests the rate of breakthrough COVID infections in April was worse in boosted Americans compared to unboosted Americans though rates of deaths and hospitalizations remained the lowest among the boosted.

    The new data do not mean booster shots are somehow increasing the risk. Ongoing studies continue to provide strong evidence of additional protection offered by booster shots against infection, severe disease, and death.

    Instead, the shift underscores the growing complexity of measuring vaccine effectiveness at this stage of the pandemic. It comes as officials are weighing key decisions on booster shots and pandemic surveillance, including whether to continue using the “crude case rates” at all.

    It also serves to illustrate a tricky reality facing health authorities amid the latest COVID-19 wave: even many boosted Americans are vulnerable to catching and spreading the virus, at a time when officials are wary of reimposing pandemic measures like mask requirements.

    “So, one of the dynamics here is that people feel, after vaccination and boosting, that they’re more protected than they actually are, so they increase their risks,” he said. “That, I think, is the major driver of these statistics.”

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    When To Seek Medical Attention

    New, unexpected or persistent symptoms

    Speak with a health professional if you are worried about a potential vaccine side effect, have new or unexpected symptoms, or if you have an expected side effect that hasnt gone away after a few days.

    The COVID-19 vaccine side effects symptom checker can help and you can contact the Adverse Medicine Events line for information about side effects and to forward reports to the TGA. The service is, however, unable to provide medical advice.

    Symptoms more than 4 days after vaccination

    A very rare condition called thrombosis with thrombocytopenia syndrome has been reported as confirmed or probable in 139 Australians who receive their first dose of the AstraZeneca COVID-19 vaccine .18 There have been over 13.2 million doses of the AstraZeneca vaccine given. Australian data show that the risk of this very rare side effect is lower in people that are older. It appears that the condition is also more severe in younger people.19 Current estimates of risk are summarised in the following table.

    • rash or bruising not at the injection site that cannot be explained.21


    Myocarditis and pericarditis are rare side effects that typically occur within 10 days of vaccination with the Pfizer or Moderna mRNA vaccines. Cases are usually short lived and resolve following treatment and rest.

    Seek medical attention if you experience any of these symptoms

    Severe allergic reactions

    Who Is To Be Vaccinated With Which Vaccine

    Five vaccines are approved in Germany: the mRNA vaccines by BioNTech/Pfizer and Moderna, the vector vaccines by AstraZeneca and Johnson & Johnson, and the protein vaccine by Novavax.

    The Standing Committee on Vaccination recommends that people under 30 should be given the Novavax and the BioNTech vaccine. The recommendation for BioNTech applies both to initial vaccinations and any later booster vaccination. Even if a different vaccine was used initially, the BioNTech vaccine should be used for additional vaccinations. Since the introduction of the mRNA vaccines by Biontech/Pfizer and Moderna, rare cases of myocarditis and/or pericarditis have been known to occur in younger people after receiving these vaccines. Current analyses indicate that myocarditis and pericarditis are observed more frequently in those under 30 after receiving Moderna than after receiving Biontech.

    For those aged 30 and over, there is no increased risk of myocarditis or pericarditis after receiving a vaccination with Moderna.

    According to the STIKO recommendation, the AstraZeneca and Johnson & Johnson vaccines should be used primarily for those aged over 60. The reason for this is that very rare but severe side effects have been observed in connection with these vaccines. According to the STIKO, younger people can receive both vaccines if they wish and have been fully informed by their doctor.

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    Second Dose For Immunocompromised

    Immunization for immunocompromised individuals should occur at a time when the individual is most likely to mount an immune response. Consult your physician for the best time based on your treatment plan.

    When to book

  • Pfizer or Moderna 8 weeks after your first dose
  • AstraZeneca 8 weeks after your first dose is recommended, but as early as 28 days after your first dose if that is the most appropriate timing
  • Strategies For Reaching People With Limited Access To Covid

    The second dose of coronavirus vaccine might make you sick. Here

    Feedback from Jurisdictional Listening Sessions

    One of the seven goals of the National Strategy for the COVID-19 Response and Pandemic Preparednesspdf iconexternal icon is to protect groups at higher risk for COVID-19 and advance health equity.

    On this page, the Centers for Disease Control and Prevention outlines practices reported during jurisdictional listening sessions conducted in February and March 2021 with CDCs Vaccine Task Force. These listening sessions focused on how to leverage relationships with existing systems to reach populations who might need help accessing COVID-19 vaccination.

    The strategies reported by jurisdictions on this page are not formal recommendations from CDC they are listed as broad considerations other jurisdictions can consider adapting in their communities.

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    Vaccine Breakthroughs And Variants

    CDC continues to actively monitor vaccine safety and effectiveness against new and emerging variants for all FDA-authorized COVID-19 vaccines. Research shows that the FDA-authorized vaccines offer protection against severe disease, hospitalization, and death against currently circulating variants in the United States. However, some people who are fully vaccinated will get COVID-19.

    The Delta variant is more contagious than previous variants of the virus that causes COVID-19. However, studies so far indicate that the vaccines used in the United States work well against the Delta variant, particularly in preventing severe disease and hospitalization.

    Overall, if there are more COVID-19 infections there will be more vaccine breakthrough infections. However, the risk of infection, hospitalization, and death are all much lower in vaccinated compared to unvaccinated people. Therefore, everyone ages 5 years and older should get vaccinated to protect themselves and those around them, including family members who are not able to be vaccinated from severe disease and death.

    Feeling Bad After A Second Covid

    This article was published more than 6 months ago. Some information may no longer be current.

    Twelve-year-old Samekh Nadeem, right, watches as his brother Sion Nadeem, 13, receive his Pfizer COVID-19 vaccination at the Embassy Grand Convention Centre in Brampton, Ont. on May 25, 2021.Fred Lum/the Globe and Mail

    If youre lucky, getting your second dose of a COVID-19 vaccine may make you feel worse than some people feel after getting infected with the virus itself.

    This apparent paradox is one of the consequences of how the vaccines currently available to Canadians are designed to work. And it relates directly to why the virus is so dangerous and insidious in the first place.

    At the most basic level, a virus is little more than a package of genetic information that has evolved to hijack our cells in order to make copies of itself. To achieve this goal, the virus that causes COVID-19 carries some additional instructions besides the bare minimum it needs to reproduce. Those extra instructions allow it to delay the bodys initial immune response, which can buy the infection time to get established and start spreading.

    Since there is nothing in the vaccine RNA that is made to hinder an immune response, the body springs into its infection-fighting position right away. For many people, that will mean feeling under the weather in the first day or two after getting a shot but thats not necessarily a bad thing.

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    Why Do Some People Get Side Effects After Covid

    Why do some people get side effects after COVID-19 vaccines?

    Temporary side effects including headache, fatigue and fever are signs the immune system is revving up — a normal response to vaccines. And theyre common.

    The day after getting these vaccines, I wouldnt plan anything that was strenuous physical activity, said Dr. Peter Marks, the U.S. Food and Drug Administrations vaccine chief, who experienced fatigue after his first dose.

    Heres whats happening: The immune system has two main arms, and the first kicks in as soon as the body detects a foreign intruder. White blood cells swarm to the site, prompting inflammation thats responsible for chills, soreness, fatigue and other side effects.

    This rapid-response step of your immune system tends to wane with age, one reason younger people report side effects more often than older adults. Also, some vaccines simply elicit more reactions than others.

    That said, everyone reacts differently. If you didnt feel anything a day or two after either dose, that doesnt mean the vaccine isnt working.

    Behind the scenes, the shots also set in motion the second part of your immune system, which will provide the real protection from the virus by producing antibodies.

    People also occasionally have serious allergic reactions. Thats why youre asked to stick around for about 15 minutes after getting any type of COVID-19 vaccine to ensure any reaction can be promptly treated.

    What About Future Variants

    Many report side effects after second COVID-19 vaccine dose

    So far, the preliminary data shows our current vaccines are effective at protecting against circulating variants.

    But as the virus mutates, there is increasing chance of viral escape. This means there is a greater chance the virus will develop mutations that make it fitter against, or more easily able to evade, vaccinations.

    Scientist are closely monitoring to ensure our current and/or future vaccines are effective against the circulating strains.

    To help the fight against COVID-19 the best thing we can do is minimise the spread of the virus. This means get vaccinated when you can, ensure you maintain social distancing when required and get tested if you have any symptoms.

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    Q: I Took Tylenol Before I Had My Covid Vaccine Shots And Had Very Little Reaction To The Shots Did I Make A Big Mistake

    You shouldnt try to stave off discomfort by taking a pain reliever before getting the shot. The concern is that premedicating with a pain reliever like acetaminophen or ibuprofen , which can prevent side effects like arm soreness as well as fever or headache, might also blunt your bodys immune response.

    While its possible that taking a pain reliever before your shots might have dampened your bodys immune response, vaccine experts say you shouldnt worry, and you shouldnt try to get a new round of replacement shots. Studies of other vaccines suggest that while premedicating can dull the bodys immune response to a vaccine, your immune system can still mount a strong enough defense to fight infection. A review of studies of more than 5,000 children compared antibody levels in children who took pain relievers before and after vaccinations and those who did not. They found that pain relievers did not have a meaningful impact on immune response, and that children in both groups generated adequate levels of antibodies after their shots.

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