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Because the virus changes every year, so immunities developed to protect against one won't stop the other one

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11y ago
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Q: Why don't we become immune to the influenza virus after exposure?
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Related questions

Can you get influenza by kissing someone?

yes,you can get influenza by kissing,if Your immune system were weak against that virus


Which operation may be turned on in the body if you contract the influenza virus?

In those with healthy immune systems, the exposure to the virus causing the flu will trigger an immune response. This is how our bodies disable the virus so it can not continue to infect us. See the related question in the related questions section for more information on how the immune system works in these situations.


Should you get a flu shot when you have bell's palsy?

It won't hurt; the flu vaccine is non-virulent and won't lower your immune system while it makes antibodies to the influenza virus. It will still be able to fight off the Bell's Palsy virus (herpes).


If you had Swine Flu are you then immune to it?


What organism does the influenza infect?

Humans are organisms which can become infected by the influenza virus.


Why can you get the flu loads of times?

The influenza virus, unfortunately, is constantly mutating into new variations which keeps your immune system off guard.


Is influenza caused by bacteria?

Influenza is a viral infection - it is caused by a virus, not a bacterium.


A picture of the influenza virus?

A link below will show a picture of the influenza virus.


Is influenza viral?

Yes, influenza is a virus.


Is Influenza a air-borne or blood-borne virus?

Influenza is an air-borne virus.


Was the influenza virus a hidden virus?

No it is an active virus.


Is influenza virus prokaryotic or eukaryotic?

Influenza are a virus type.They do not have cells