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How Does The Immune System Fight Smallpox
Agree w Dr. Raff: A study called “Duration of antiviral immunity after smallpox vaccination.” Hammarlund E. etal (Nat Med 2003) showed that >90 % of volunteers vaccinated 25 to 75 years prior still had significant humoral / cellular immunity. ** http://www. Ncbi. Nlm. Nih. Gov/pubmed/12925846**See 1 more doctor answer
Two stages: Natural Killer cells are the first immune step that seeks out the malaria to mark it for the body to "kill" it. A second step is the T cell that also seeks the genetic marker of the malaria to flag it for a "kill". Since malaria invades natural cells of the body it can begin to hide from the immune system and replicate. Consider vaccination if traveling in high risk areas with malaria.
Heard to simplify.: Like a complicated orchestra plays a difficult score. Different germs produce different responses. There are is nonspecific and specific immune responses. Even the skin oils, saliva, stomach acid tears and sweat are important here. It is much to difficult to quickly answer which is why I taught a course taking 20 hours on the subject to medical students.
Why does the immune system fight & heal physical illnesses but most likely not or never mental illnesses?
Mental illness: This is a very good question and the answer has eluded the medical profession for a long time. Not all mental illness is based on a immune imbalance though and some is related to hormonal imbalances. The workings of the brain are still pretty mysterious. Stay tuned.
Complicated: Natural killer cells can recognize tumor cells and virally infected cells and destroy those. T-cells and antibodies to markers on tumor cells may also destroy tumor cells. Unfortunately, most of the time, some cancer cells evade this destruction and continue the disease process. The hope and potential of immune therapy remains to be realized.
Nothing specific...: There are no specific foods studied in the scientific literature that boost the immune system but eating a healthy diet in general is good for all aspects of health. A diet rich in fruits, veggies, whole grains, lean meats, and healthy fats will certainly make you feel good.
If you don't get gastroenteritis for years does the immune system become less efficient at fighting it and thus causing severe symptoms when infected?
Consider this...: Lots of things can cause GI distress to recur--incompletely treated infection (e.g. Giardia) or re-exposure with re-infection; maldigestion (pancreatic insufficiency) or malabsorption (celiac sprue); food intolerances with re-exposure to the offending substance (lactose, sorbitol, etc.), irritable bowel syndrome, missed diagnosis (incomplete evaluation), non-gi related problems (uti, pid, etc.).
Immune defense: TheRe are textbooks written about this, this is not the right forum for your question.
Is it possible that if a person become in contact with HIV through sex and the virus is at a low level, can the immune system fight it off?
HIV: There is a rare subgroup of individuals who have an altered version of the viral attachment site for the cell. Generally this means that the infection progresses less rapidly, but prevention is conceivable. Transmission is never 100% and the lower the viral load the lower the risk of infection, but not because the immune system fights it off.
What does the immune system do? If it fights infection, why does everyone still get the flu and the cold?
What is the level of: General immunity for the person? Has the person developed antibodies to the specific viruses that they are being exposed to? Are person who is immunodeficient is more likely to become infected. Or if the person is exposed to a germ that is novel to them - they are more likely to be susceptible.
Why are immunosuppressants good for some people if we need our immune system to fight off disease?
Relative: Immuno-suppression is resorted to when there is a "hyperactive " immune state leading to an auto-immune disease or condition, or to allow the immune system to adapt to a transplanted tissue, that doesn't mean that the immune system is totally knocked out (in some states yes during bone marrow transplant) but can still fight certain infections, till total recovery, the immune system is complex
If you have an asymptomatic illness, does that mean your immune system isn't fighting the illness off?
Asymptomatic: If you have an illness that is asymptomatic then you should not feel the illness. Asymptomatic means no symptoms do it is hard to tell your sick. This would mean you immune system works.
I'm just wondering, if you have an extremely strong immune system, can you fight off or become immune to malaria?
The other day it felt like my immune system was fighting off something. Is that even possible? I felt a little sick and tired.
Unlikely: But cannot disprove your feelings. It may be that you, in fact were coming down with a mild illness and that your system rejected it, but mild periods of abnormal sensations are not uncommon and may simply be a state of mind. As long as you are getting better you should be fine. Best wishes.
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