No, a flu shot tricks your immune system to think you have the flu and it makes and sends antibodies to fight the infection, if you have an otherwise healthy immune system. The immune responses do not "decrease" your system's ability to protect you and actually may help you respond more quickly to the next antigen (causative organism).
A flu shot just introduces a "dead" or weakened flu virus to your system so it can work out how to make antibodies against that organism in advance of a real infection by a full-strength flu virus. The immune system in healthy individuals is ready and able to go to work to fight infections, and the more organisms it works against, the more patterns for antibodies there are in your immune system "memory". Some of the old patterns may match the new organism well enough to provide protection, or make it easier for your immune system to build slight variations in them to work on the new antigen. So, exposure to more organisms may actually help prime your immune system so it can respond more quickly to any "invasion".
Cystic fibrosis affects primarily lungs and pancreas, not immune system. But a patient affected is debilitated and it would decrease the fuction of various systems, like the immune A CF patient that has had a lung transplant would have an impaired immune system because of the medication given for rejection. The medication would suppress the immune system so that the patients' body would be more likely to accept the new organ(s), but also making the patient more susceptible to other illnesses.
Well I learned in Biomedical that the Immune system fights off infection on your pecker.
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Your immune system. AIDS will make you more susceptible to other diseases, it will not directly affect any other body systems.
The immune system keeps deadly bacteria out of it so that it can survive and reproduce. Without the immune system, the body wouldn't be able to live for more than an hour (literally.).
Your immune system have nothing to do with head lice. Personal hygiene is much more involve with it.
The Thymus
A crocodile has a better immune system, since they existed before sharks, they are more used to the illnesses so they are more immune. Also they live in dirty waters and muddy places so their immunity is high.
The exact molecular details of how interferons act is still unclear. They may make surface-exposed antigens of tumors even more capable of stimulating the immune system, which in turn would elicit a greater response from the T-cells of the immune system
the immune system fights diseases by creating more white blood cells which trigger more white blood cells that make antibodies.
The immune system is compromised; which makes the person more susceptible to other infections.
If you have an an inflammatory form of arthritis like for example RA it is the immune system that is attacking your joints and you need to treat it by suppressing the immune system to a degree. you would be wise to check with your doctor what treatments are best for you to self administer in any case.