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The only real difference is the medium that holds the virus in the vaccine, one is made for injection into muscles and the other is for using as a nasal mist. The current vaccination for H1N1/09 is available in both types of vaccines. The virus used in both vaccines is the same, except the nasal mist uses "live attenuated" viruses (they are still active whole viruses but have been treated to weaken them so they can not make an otherwise healthy person sick). The viruses in the vaccine for giving in a shot are totally inactive ("dead") or are just pieces of the virus particles instead of the whole viral organism, which also can not make you sick. See the related question below about which is better to use for your circumstances.

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Q: What is the difference between nasal H1N1 vaccines and the injected H1N1 vaccines?
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Related questions

How many vaccines are there?

Two: The nasal inhalant, and the injection.


What is a vaccine that contains live weakened pathogens?

They are called live attenuated vaccines. Attenuated means weakened. The nasal mist flu vaccine is an example of a live attenuated vaccine. The vaccines for flu that are injected are made from pieces of viruses or "dead" viruses. See the related question below for more information on these two types of vaccines.


What is the difference between live vaccine and dead vaccine?

Vaccines are usually small amount of the disease you are trying to prevent. Introducing small amounts of the virus or bacteria, whether it is live or inactive, stimulate your immune system to strengthen its defenses against that germ.


How many H1N1-09 vaccines are there?

Two: The nasal inhalant, and the injection.


Can you Explain the live virus in vaccines?

Vaccines are small amounts of live viruses injected into the body. These viruses teach the body's immune system how to fight off the disease. Correction: Some viruses are live. Some are weakened, most flu vaccines are dead viruses, not live, although the nasal mist is a live, weakened virus. Please make sure your answers are correct.


Is there another form of HPV vaccines other than a shot?

The only HPV vaccines today have been in injectable form. There are no nasal or oral vaccines for HPV as of 2015.


What is the difference between snot and mucous?

Snot is a form of nasal mucus.


What is the difference between the bony nasal cavity and the nasal cavity?

The bony nasal cavity is made up of the hard palate and the palatine process of the maxilla. The nasal cavity is made up of the rest of the nasal sinuses and includes the bony nasal cavity.


What type of influenza vaccine should a pregnant woman receive?

Only those that are made from inactive "dead" virus particles and not the LAIV Live Attenuated Influenza Vaccines. That means that you should get injected vaccines for the flu instead of the nasal mists that contain "live" but weakened viruses. See the related question below for the recommendations from gynecologists and obstetricians for flu vaccinations in pregnancy.


Are all vaccines vaccination and immunizions shots?

No, some are provided through nasal or oral routes.


What cosmetics contain thimerosal?

make-up, eye care products, nasal, vaccines


Are the microbes that are injected in a vaccination dead or alive?

They can be either. Some vaccines are made with dead viruses or particles of viruses and other vaccines are made with attenuated (weakened) viruses that are not able to make an otherwise healthy person sick. In 2009 the swine flu vaccine approved for use in the US was prepared both ways, the nasal flu vaccine was made from attenuated viruses and the shots were made with dead viruses.