Why are there no antiviruses? Is the organism to diversified or complicated? Frank
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Don't confuse bacteria with viruses. Our bodies do not build up immunity to bacteria. You could get strept or staph over and over and over. Each time the body has to mount an immune response as if it was the first time.
With viruses we build up immunity (or anti-virals.) In general, if you get a virus once and survive it, you will not get it again. Of course the common cold virus mutates so much that it can evade our defenses. Let me shift to bullet form:
1. Smallpox was such a lethal virus that not too many people survived. Those that did survive developed immunity.
2. Immunity occurs when your body identifies the virus in the body very, very quickly. It mounts a rapid defense with T cells and B cells to eradicate it from the body before it becomes a problem.
3. HIV has no cure or vaccine because it infects the cells that destroy viruses...T cells. Hence, people with full blown AIDs get rare infections that are only seen in immunocomprimed hosts.
4. People who survive smallpox have better immune systems, they are more likely to pass on these genes...hence natural selection. This is why you didn't see the massive death tolls in Eurpoe at any one time with smallpox.
More on immunity:
1. Vaccines work by injecting the dead virus or part of th live virus into the person.
2. The concept is that the body recognizes the virus, establishes immunity, and they can't get infected again via previously mentioned mechanisms.
3. Chickenpox or Shingles: This is herpes varicella zoster. This is never completely eliminated from the body. Shingles is not a reinfection of herpes zoster but a reactivation. Anybody who has ever had chickenpox currently has varicella zoster living in the dorsal root ganglion of some nerve roots. Our immune system keeps it suppressed, but if our immune system gets compromised it can emerge. Hence, why elderly get shingles. As we age our immune system weakens. However, anybody age can have shingles.
4. Salk invented the Polio Virus by getting the immune system to recognize part of the virus without given the infection. He tested it on himself and his family first. It was a live virus at that time, so it did give some people Polio. Theoretically that was impossible but the virus mutated in people's bodies or incorporated itself into human genomes.
5. Salk revolutionized medicine. Polio is now considered eradicated from the US.
Let me take a break here. Is this too confusing? Any questions for clarification? Anybody want to bring up fake sheep skins(now is the time?)