Is there vaccine non-effectiveness?

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In summary, there are two main reasons for vaccine failures: vaccine-related factors and host-related factors. Vaccine-related factors include issues with vaccine potency, dosage, and administration, while host-related factors can include genetics, immune status, age, health, and nutrition. These factors can lead to primary vaccine failures, where the person is unable to respond to the initial vaccination, or secondary vaccine failures, where the person loses protection after initially being effective. It is known that older populations may require higher doses of certain vaccines, such as influenza, which can also contribute to primary vaccine failures. It is also possible for a person to not produce antibodies to a specific vaccine, such as the Hepatitis B vaccine, and may need to repeat it in order to receive
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icakeov
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Hello, is there such a thing as a vaccine “not having any effect” on a person, and for some reason making it a “dud” for that specific person?

I guess if the dose isn’t strong enough that could be the case, but is there such a thing of the person not “reacting” to those antibodies for some reason, or rejecting them? Or some other reason why a vaccine "wouldn't work" on a specific person.
 
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4962729/Abstract
There are 2 major factors responsible for vaccine failures, the first is vaccine-related such as failures in vaccine attenuation, vaccination regimes or administration. The other is host-related, of which host genetics, immune status, age, health or nutritional status can be associated with primary or secondary vaccine failures. The first describes the inability to respond to primary vaccination, the latter is characterized by a loss of protection after initial effectiveness. Our studies concentrate on the evaluation of immunological characteristics responsible for primary vaccine failures in different (risk) populations for which the underlying mechanisms are currently unknown. Here we summarise current knowledge and findings from our studies...

Note that "type 2" failure has components - failure to immunize, failure to maintain resistance.
Elderly populations normally require greater doses of influenza vaccine, a kind of failure to immunize.
 
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Yes, this does happen.
I have had a Hepatitis B vaccine that I did not produce antibodies to.
I should repeat it.
 
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Many thanks!
 
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1. What causes vaccine non-effectiveness?

Vaccine non-effectiveness can be caused by a variety of factors, including the type of vaccine being used, the individual's immune system response, and the presence of new or mutated strains of the virus. Additionally, certain medical conditions or medications can also impact the effectiveness of a vaccine.

2. How common is vaccine non-effectiveness?

The occurrence of vaccine non-effectiveness varies depending on the specific vaccine and individual. In general, most vaccines are highly effective, with success rates ranging from 80-95%. However, there are rare cases where a vaccine may not provide full protection.

3. Can vaccine non-effectiveness be prevented?

While there is no guaranteed way to prevent vaccine non-effectiveness, there are steps that can be taken to increase the likelihood of a successful immune response. This includes ensuring that the individual is up to date on all recommended vaccinations, following the recommended vaccine schedule, and maintaining a healthy lifestyle.

4. Is vaccine non-effectiveness the same as vaccine failure?

No, vaccine non-effectiveness and vaccine failure are not the same. Vaccine failure refers to cases where an individual does not develop immunity after receiving a vaccine. Vaccine non-effectiveness, on the other hand, refers to cases where the vaccine does not provide full protection against the disease, but may still provide some level of immunity.

5. How can vaccine non-effectiveness be detected?

Vaccine non-effectiveness is typically detected through post-vaccination testing or monitoring of individuals who have received the vaccine. This can include measuring antibody levels or tracking the occurrence of the disease in vaccinated individuals. Additionally, reporting any symptoms or breakthrough infections to healthcare providers can also help identify cases of vaccine non-effectiveness.

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