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It sounds like some people here aren't understanding how flu shots work. A small amount of dead virus (or something like that) is injected and your immune system then creates antibodies for the non-active viruses injected. So your immune system
It sounds like some people here aren't understanding how flu shots work. A small amount of dead virus (or something like that) is injected and your immune system then creates antibodies for the non-active viruses injected. So your immune system does work as a result of a flu shot, just like it would if you contracted the flu. You just don't have to suffer through a full blown flu.
Also, each year they choose the five flu viruses they think are most likely to be a problem. But it could be that you become infected with a virus that wasn't in that year's flu shot. It doesn't mean you didn't receive protection for the flu strains the shot was meant to cover.
I'm supposed to have a flu shot every year since I have a damaged lung, but I don't always.
There are two main types of flu vaccines available. The most common is an injection and is a killed (inactivated) vaccine. You CAN NOT contract the flu from receiving this vaccine. The vaccine contains pieces of the virus that your immune system reacts to and develops antibodies. Then if you are later exposed to the live virus, your immune system is prepared to mount a quicker response. You can, however, experience flu-like symptoms such as aches and fever, just like with any vaccine.
There is also a nose spray vaccine that is a modified live version of the flu virus. What this means is that the virus is alive but weakened. Because this is a live vaccine, it is not an option for those typically at greater risk. You can develop true mild flu symptoms from this vaccine.
People also don't realize that getting the flu vaccine is equally important for those around you as for yourself. Another benefit of vaccination is through "herd immunity." Even if you are vaccinated, you are still at increased risk of contracting it if the people around you are not vaccinated. In this case, it will still have the benefit of lessening the symptoms. Anyone who lives with or is frequently around the elderly, the immune-compromised, or children should get the vaccine to help protect them.