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Infectious viruses that humans get require the cells of a human host to replicate themselves. The viruses make the cells stop doing their normal function for the host and turn them into virus-making factories by manipulating the DNA/RNA in the human cells. When the body recognizes foreign organisms, it causes an immune response. The immune response includes some of the symptoms you feel with the infectious disease, such as fever (an attempt to make the cells too hot for the germs to "reproduce").

With influenza viruses like H1N1, the virus uses the cells of the respiratory system. This is why you have respiratory symptoms like cough, runny nose, etc. If the virus is one that attaches to the cells of another body system, then the symptoms will be different because the cells that are being destroyed in the process of viral reproduction cause different symptoms when they are not functioning correctly. For example, viral gastroenteritis (also known incorrectly as "stomach flu") causes diarrhea and vomiting because the virus is affecting the cell function of the cells in the gastrointestinal system.

The illness you feel with the flu virus infections is due to the damage that the virus does to your cells while it infects them. The body cells are eventually killed when they split open to release the new virions (virus particles). While your cells are diverted from their usual function, and once they are dead, they also can cause symptoms due to your body not having them do what they should be doing until you build new cells to replace the dead and damaged ones.

See more information about how the immune system works and flu symptoms in the related questions below.

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12y ago

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Related Questions

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no.


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Do you get the H1N1 shot in your arm?

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How safe is the H1N1 shot?

The shot has been tested just as all flu vaccines are and it perfectly safe.


Should you give your 6 month old the H1N1 shot?

nooooooooooooooooo! please don't


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Millions..Mainly kids and pregnant women, hospitol staff.


If you have had H1N1 do you still need to get the shot?

If the correct test was done to confirm the H1N1, then, no there is no need to take it again. But if you are not absolutely sure that the test confirmed the A-H1N1/09 flu, then it will do no harm to take the vaccine. The only test that can be relied upon to be an absolute indicator of the vaccination is the RT-PCR test, and not the rapid tests done in the doctor's offices. you should have some immunity against 2009 H1N1 flu and can choose not to get the 2009 H1N1 vaccine.


Are kids with out the shot a target of the H1N1?

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