Can You Get the Flu if You Had the Flu Shot

Note: Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2021-2022 Influenza Flavour" has been published. More information on the 2021-2022 season is as well available.

• Misconceptions almost Influenza Vaccines
• Misconceptions near Flu Vaccine Effectiveness
• Misconceptions about the Timing of Seasonal Flu Vaccination
• Misconceptions virtually Physician Consent for Vaccination
• Misconceptions about "Stomach Flu"

Misconceptions about Influenza Vaccines

Can a flu vaccine requite you flu?

No, influenza vaccines cannot cause flu affliction. Flu vaccines given with a needle (i.eastward., influenza shots) are fabricated with either inactivated (killed) viruses, or with simply a unmarried protein from the flu virus.  The nasal spray vaccine contains live viruses that are attenuated (weakened) so that they volition non cause illness.

Are whatever of the available flu vaccines recommended over the others?

For the 2021-2022 flu season, the Advisory Commission on Immunization Practices (ACIP) recommends annual influenza (flu) vaccination for everyone vi months and older with any licensed, influenza vaccine that is appropriate for the recipient's age and health status, including inactivated flu vaccine (IIV4), recombinant influenza vaccine (RIV4), or alive attenuated nasal spray flu vaccine (LAIV4) with no preference expressed for whatever 1 vaccine over another.

There are many vaccine options to choose from, only the about important affair is for all people half-dozen months and older to get a flu vaccine every year. If you lot accept questions about which vaccine is best for you, talk to your doctor or other health care professional person.

Is information technology improve to get sick with influenza than to get a flu vaccine?

No. Flu can exist a serious disease, especially among immature children, older adults, and people with sure chronic health conditions, such as asthma, centre disease or diabetes. Any flu infection can deport a risk of serious complications, hospitalization or death, fifty-fifty amid otherwise healthy children and adults. Therefore, getting vaccinated is a safer option than risking disease to obtain allowed protection.

Practise I really need a flu vaccine every year?

Yes. CDC recommends a yearly flu vaccine for everyone 6 months of age and older with rare exception. The reason for this is that a person's immune protection from vaccination declines over fourth dimension, so an annual vaccination is needed to get the "optimal" or best protection against the flu. Additionally, flu viruses are constantly changing, and so the vaccine composition is reviewed each twelvemonth and updated equally needed based on which influenza viruses are making people sick.

Why do some people not feel well after getting a seasonal flu vaccine?

Some people report having mild side effects afterwards flu vaccination. The most common side furnishings from influenza shots are soreness, redness, tenderness or swelling where the shot was given. Low-course fever, headache and muscle aches also may occur. If these reactions occur, they usually brainstorm soon after vaccination and last 1-2 days. In randomized, blinded studies, where some people got inactivated flu shots and others got common salt-water shots, the just differences in symptoms was increased soreness in the arm and redness at the injection site amidst people who got a flu shot. There were no differences in terms of body aches, fever, cough, runny nose or sore throat.

Side effects from the nasal spray flu vaccine may include: runny nose, wheezing, headache, vomiting, musculus aches, fever, sore throat and coughing. If these problems occur, they unremarkably begin soon after vaccination and are balmy and brusk-lived. The most common reactions people take to flu vaccines are considerably less severe than the symptoms caused by actual flu illness.

• Carolyn Bridges et al. (2000). Effectiveness and price-benefit of influenza vaccination of healthy working adults: A randomized controlled trialexternal icon .

What about serious reactions to flu vaccine?

Serious allergic reactions to flu vaccines are very rare. If they do occur, it is ordinarily within a few minutes to a few hours later on vaccination. While these reactions can be life-threatening, constructive treatments are bachelor.

What nigh people who get a seasonal influenza vaccine and notwithstanding become ill with flu symptoms?

There are several reasons why someone might get flu symptoms, even after they accept been vaccinated against flu.

1. I reason is that some people can become ill from other respiratory viruses besides influenza such as rhinoviruses, which are associated with the common cold.  These viruses can cause symptoms similar to flu, and also spread and cause disease during flu flavour. Flu vaccines merely protect confronting flu and its complications, not other illnesses.
2. Some other explanation is that it is possible to be exposed to influenza viruses, shortly before getting vaccinated or during the ii-week period subsequently vaccination that information technology takes the body to develop immune protection. This exposure may result in a person condign sick with flu before protection from vaccination takes effect.
3. A third reason why some people may experience influenza symptoms despite getting vaccinated is that they may accept been exposed to a flu virus that is very different from the vaccine viruses. The ability of a influenza vaccine to protect a person depends largely on the similarity or "match" betwixt the vaccine viruses chosen to brand vaccine and those spreading and causing illness. In that location are many dissimilar influenza viruses that spread and cause disease among people. For more information, run across Influenza (Flu) Viruses.
4. The final explanation for experiencing flu symptoms after vaccination is that flu vaccines  vary in how well they work and some people who get vaccinated nonetheless get ill with flu. When that happens, though, vaccination has been shown in several studies to reduce severity of illness in those people who get vaccinated but still get ill.

Tin can vaccinating someone twice provide added immunity?

In adults, studies have non shown a benefit from getting more than one dose of vaccine during the same flu flavor, even amid elderly persons with weakened immune systems. Except for children getting vaccinated for the starting time time, only 1 dose of flu vaccine is recommended each flavor.

Is it truthful that getting a flu vaccine can brand you more susceptible to other respiratory viruses?

Flu vaccines are not thought to make people more than susceptible to other respiratory infections.

A 2012 studyexternal icon that suggested that influenza vaccination might make people more than susceptible to other respiratory infections. Later that written report was published, many experts looked into this issue further and conducted boosted studies to see if the findings could be replicated. No other studies accept establish this consequence. It'due south not clear why this finding was detected in the one study, but the bulk of evidence suggests that this is non a common or regular occurrence and that flu vaccination does non, in fact, make people more susceptible to other respiratory infections.

• Maria Sundaram et al. (2013). Influenza Vaccination Is Not Associated With Detection of Noninfluenza Respiratory Viruses in Seasonal Studies of Influenza Vaccine Effectivenessexternal icon.

Does a flu vaccination increment your risk of getting COVID-nineteen?

There is no testify that getting a influenza vaccination increases your risk of getting sick from a coronavirus, similar the 1 that causes COVID-nineteen.

You may have heard well-nigh a written reportexternal icon published in January 2022 that reported an clan between flu vaccination and adventure of iv commonly circulating seasonal coronaviruses, but non the one that causes COVID-19. This study was after found to be incorrect.

The results from that initial report led researchers in Canada to await at their data to see if they could notice similar results in their population. The results from Canada's studyexternal icon showed that influenza vaccination did not increase gamble for these seasonal coronaviruses. The Canadian findings highlighted the protective benefits of flu vaccination.

The Canadian researchers too identified a flaw in the methods of the first study, noting that it violated the part of report pattern that compares vaccination rates amidst patients with and without flu (examination negative design). This flaw led to the incorrect clan between flu vaccination and seasonal coronavirus risk. When these researchers reexamined data from the start report using correct methods, they institute that influenza vaccination did not increase risk for infection with other respiratory viruses, including seasonal coronaviruses.

Misconceptions about Flu Vaccine Effectiveness

Influenza (flu) vaccine effectiveness (VE) can vary. The protection provided by a flu vaccine varies from season to season and depends in office on the historic period and wellness status of the person getting the vaccine and the similarity or "lucifer" between the viruses in the vaccine and those in circulation. During years when the flu vaccine match is good, it is possible to measure substantial benefits from influenza vaccination in terms of preventing flu illness and complications. However, the benefits of flu vaccination will nonetheless vary, depending on characteristics of the person being vaccinated (for example, their health and age), what influenza viruses are circulating that season and, potentially, which blazon of influenza vaccine was used. For more than information, see Vaccine Effectiveness – How well does the Flu Vaccine Piece of work. For information specific to this season, visit About the Current Flu Flavor.

There are many reasons to become an influenza (flu) vaccine each year. Flu vaccination is the best way to protect yourself and your loved ones against flu and its potentially serious complications.

Below is a summary of the benefits of influenza vaccination and selected scientific studies that support these benefits.

• Flu vaccination can continue you from getting sick with flu.

• • Flu vaccination prevents millions of illnesses and flu-related doctor'south visits each year. For example, during  2019-2020 flu vaccination prevented an estimated 7.5 million influenza illnesses, 3.7 million flu-associated medical visits, 105,000 influenza-associated hospitalizations, and 6,300 flu-associated deaths.
  • During seasons when flu vaccine viruses are similar to circulating flu viruses, flu vaccine has been shown to reduce the risk of having to get to the doc with flu past 40 percent to lx percent.

• Influenza vaccination has been shown in several studies to reduce severity of illness in people who get vaccinated simply still get sick.
  • A 2022 written reportexternal icon showed that amid adults, flu vaccination was associated with a 26% lower risk of ICU admission and a 31% lower risk of expiry from flu compared to those who were unvaccinated.
  • A 2022 reportexternal icon showed that amid adults hospitalized with influenza, vaccinated patients were 59 percent less likely to exist admitted to the ICU than those who had not been vaccinated. Amid adults in the ICU with flu, vaccinated patients on boilerplate spent 4 fewer days in the hospital than those who were not vaccinated.

• Flu vaccination can reduce the risk of flu-associated hospitalization.
  • Flu vaccination prevents tens of thousands of hospitalizations each yr. For example, during 2019-2020 flu vaccination prevented an estimated 105,000 influenza-related hospitalizations.
  • A 2014 studyexternal icon showed that flu vaccination reduced children's risk of flu-related pediatric intensive intendance unit (PICU) admission by 74 per centum during influenza seasons from 2010-2012. A 2022 study found that during 2009-2016, influenza vaccines reduced the run a risk of influenza-associated hospitalization among older adults by virtually forty percent on boilerplate.
  • A 2022 written report showed that from 2012 to 2015, influenza vaccination among adults reduced the risk of being admitted to an intensive care unit (ICU) with influenza past 82 percent.

• Influenza vaccination is an important preventive tool for people with certain chronic wellness conditions.
  • Influenza vaccination has been associated with lower rates of some cardiac eventsexternal icon among people with heart disease, particularly among those who have had a cardiac upshot in the past twelvemonth.
  • Influenza vaccination tin can reduce the risk of a flu-related worsening of chronic lung disease (for example, chronic obstructive pulmonary illness (COPDexternal icon) requiring hospitalization.
  • Amongst people with diabetesexternal icon and chronic lung illnessexternal icon ,flu vaccination also has been shown in carve up studies to be associated with reduced hospitalizations from a worsening of their chronic status.

• Flu vaccination helps protect pregnant people during and later pregnancy.
  • Vaccination reduces the run a risk of flu-associated acute respiratory infection in pregnant people by near one-half.
  • A 2022 studyexternal icon showed that getting a influenza shot reduced a pregnant person'southward risk of being hospitalized with flu by an boilerplate of twoscore percentage from 2010-2016.
  • A number of studies have shown that in addition to helping to protect pregnant people from flu, a flu vaccine given during pregnancy helps protect the babe from influenza for several months later on nascency, when he or she is as well young to be vaccinated.

• Flu vaccine can be lifesaving in children.
  • A 2022 study was the offset of its kind to show that flu vaccination can significantly reduce a child's chance of dying from flu.

• Getting vaccinated yourself may also protect people effectually you, including those who are more vulnerable to serious flu illness, like babies and young children, older people, and people with certain chronic health conditions.

Despite the many benefits offered by flu vaccination, only about half of Americans go an annual flu vaccine and flu continues to cause millions of illnesses, hundreds of thousands of hospitalizations and tens of thousands of deaths. Many more than people could exist protected from flu if more people got vaccinated.

*References for the studies listed in a higher place can be constitute at Publications on Influenza Vaccine Benefits. Likewise, run across the A Strong Defense Against Flu: Get Vaccinatedpdf icon ! fact sheet.

Misconceptions virtually the Timing of Seasonal Influenza Vaccination

Should I wait to get vaccinated so that my amnesty lasts through the cease of the season?

Influenza Vaccine Finder

Discover flu vaccines in your area.
Anybody half dozen months of age and older needs a flu vaccine.

Observe Vaccines

How long you lot are allowed or your "duration of amnesty" is discussed in the ACIP recommendations. While delaying getting of vaccine until later in the autumn may lead to higher levels of amnesty during winter months, this should be counterbalanced against possible risks, such equally missed opportunities to receive vaccine and difficulties associated with vaccinating a large number of people within a shorter fourth dimension period.

Is it also belatedly to get vaccinated later Thanksgiving (or the end of November)?

No. Vaccination tin still be beneficial every bit long as flu viruses are circulating. If you lot have not been vaccinated past Thanksgiving (or the end of November), it tin notwithstanding exist protective to become vaccinated in December or later on. Flu is unpredictable and seasons can vary. Seasonal flu disease commonly peaks betwixt December and March most years, but illness can occur as belatedly as May.

Misconceptions about Physician Consent for Vaccination

Do pregnant women or people with pre-existing medical conditions need special permission or written consent from their doctor to go a flu vaccine?

No. There is no recommendation for meaning women or people with pre-existing medical conditions to seek special permission or secure written consent from their doc for vaccination if they get vaccinated at a worksite clinic, pharmacy or other location outside of their physician's office. With rare exception, CDC recommends an annual influenza vaccine for everyone six months of historic period and older, including meaning women and people with medical conditions.

A variety of influenza vaccine products are available (Tabular array 1). Vaccine providers should exist enlightened of the canonical age indications of the vaccine they are using and of any contraindications or precautions. Providers also should accordingly screen all people getting vaccinated for allergies to vaccine components or other contraindications. People who have previously had a severe allergic reaction to influenza vaccine or any of its ingredients should generally not be vaccinated.

At that place are some people who should not get a flu vaccine without outset speaking with their dr.. These include:

• People who have a moderate-to-severe illness with or without a fever (they should wait until they recover to get vaccinated), and
• People with a history of Guillain-Barré Syndrome (a severe paralytic disease, also called GBS) that occurred subsequently receiving flu vaccine and who are not at take chances for severe illness from influenza should more often than not not receive vaccine. Tell your md if you ever had Guillain-Barré Syndrome. Your doctor volition assist y'all decide whether the vaccine is recommended for you.

Significant women or people with pre-existing medical conditions who get vaccinated should get a flu shot.

If a person is vaccinated by someone other than their primary health care provider, the vaccinating provider should ensure that the patient and, if possible, the patient's medical provider have documentation of vaccination.

For a complete listing of people who should not get a flu vaccine before speaking with their md, delight review the influenza Vaccine Data Statement for the inactivated or recombinant flu vaccine or live, intranasal influenza vaccine.

Misconceptions about "Stomach Influenza"

Is the "stomach influenza" really flu?

No. Many people apply the term "stomach flu" to draw illnesses with nausea, vomiting or diarrhea. These symptoms can be caused by many dissimilar viruses, leaner or even parasites. While airsickness, diarrhea, and being nauseous or "sick to your stomach" can sometimes be related to flu — more than commonly in children than adults — these problems are rarely the chief symptoms of influenza. Flu is a respiratory disease and not a stomach or intestinal disease.

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Source: https://www.cdc.gov/flu/prevent/misconceptions.htm#:~:text=No%2C%20flu%20vaccines%20cannot%20cause,they%20will%20not%20cause%20illness.

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