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There are many different types of flu and the seasonal flu shot only prevents three of the most likely to be circulating flu viruses. So if you happened to get exposed to a type of flu that wasn't in the vaccination, then you could get sick from it.


Another reason might be that you caught the flu before you got the flu shot and so there was not time for the shot to work before you got sick.


Another reason might be that you got the shot and then were exposed to the flu before your immune system could give you immunity from the vaccination. It takes around two weeks after getting the vaccination for an adult to have full immunity from it. For children under 10, a series of two vaccinations are needed given approximately a month apart, then it takes another few weeks before the body has developed the full immunity, so exposure during any of those time frames before full immunity can cause illness in those children.

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13y ago
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11y ago

If you actively have the flu, then the flu shot will not cure it. The flu shot is a preventative measure. There are many strains of flu. Once you have a strain of flu, you are immune to it in the future. The flu shot changes year to year in anticipation of what strains will be prevalent. Once you have gotten the flu shot, there is no need to get the same flu shot that year.

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Q: How do you get the flu when you already got a flu shot?
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Related questions

If you get a swine flu shot will the swine flu disappear in a week?

The swine flu shot is used to prevent the flu, not to treat the flu if you already have it. To treat the flu, antiviral medications are more likely to be prescribed, such as Tamiflu.


If you are exsposed to the flu are you likely to get it?

unless you got a shot, yes!


Should you get a Swine Flu vaccination if you got a seasonal flu shot?

Last flu season, 2009-2010, you needed two shots. But this year the seasonal flu shot also protects against swine flu, so, in the US, you only need one flu shot for the 2010-2011 flu season.


Can you drink if you got your flu shot yesterday?

Depends what kind you are drinking, But I woulden't if I were you.


How many people survived the Swine Flu by using taking the shot?

"The shot" is a vaccine for the swine flu. If you get the vaccine, then, in theory, you don't get the swine flu. If you didn't get it, then you didn't "survive" it, because "surviving" it means that you got the disease but didn't die from it. So, zero is the answer. On the other hand, the swine flu is no more deadly than the common flu, so the vast majority of the people who got the swine flu survived it.


How does dystonia start?

it is said getting a flu shot for H1N1/swine flu, I GOT IT TODAY so did my brother 11/11/09!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


You think you have the flu and just got the second hepatitis b shot but you had symptoms before the shot should you be worried that your immune system was too low to get the shot?

No. If anything, your immune system was more "revved up" because of the flu!


What is a simile for flu shot?

the flu shot was as painful as a bee sting.


Can you get the flu from someone who just got a flu shot and got sick from it?

It isn't possible for a flu shot to give someone the flu. The shot is made from inactive ("dead") virus particles that can not cause infection. They just provide the "pattern" of that particular virus strain to cause your immune system to react by making the right antibodies that will "kill" the same strain (pattern) of flu if a "live" particle ever does enter your body.It is unlikely, but possible, for the flu vaccine that is given in a nasal spray to cause the flu in someone who has a very weak or compromised immune system, such as due to HIV/AIDS, or chemotherapy, for example. The vaccine for use with the nasal administration is made from active virus particles that have been weakened so they won't be strong enough to cause infections, except in extremely rare situations in a specific demographic group.However, people in close association and physical contact with the person who got the nasal spray vaccine could also, theoretically, get the flu from exposure to that "live" virus in the nasal spray, so precautions are recommended for those people with poorly functioning immune systems to avoid close contact with someone who has just had the nasal vaccine (they should only use flu shots and are not supposed to take the nasal type of vaccinations themselves either).When you get a flu shot, it can take your body two weeks before you develop full immunity. If you were around someone who had the flu after getting a flu shot, they probably either had a different strain of flu than was included in the vaccine; or they were already infected immediately before getting the shot, but had not yet shown the symptoms; or they caught the virus between the time they got the shot and when their body had developed the full immunity.If any of the last three scenarios occurred, then you would be able to catch that flu from them.See the related question below, "If you had the flu shot and you get the flu what happened?" about what might have happened if you had the flu vaccination but still got the flu, for more details of the possible, but unusual circumstances, that could allow this to occur.


Why get a flu shot?

So you don't get the flu.


You are taking amox-clav can you still get the flu shot?

Yes, you can still get the flu shot. The flu shot should not be gotten if you are currently ill, but if you are on antibiotics, it is OK to get.


Should you get a flu shot with a sinus infection?

You have to wait until your better then you get the flu shot