What is a live virus immunization?

Question

What is the ways is immunization is obtained?

I heard live virus, but I don't what it does. Plus wanting to know other methods as well.

Answer 1

Live virus immunization is just what it sounds like - a living virus is injected into you (measles is a common live virus injection). Usually the virus is treated in some way so that it is less harmful than just being exposed to a sick person. In many cases, the injected organism is a relative to the human disease that is less dangous (this is the case for smallpox and tuberculosis live vaccines, for example).

Live vaccines are preferred for healthy adults because the immune response is stronger and the injected organism can sometimes multiply in your system and thus give a greater exposure. But because the virus IS alive, there is some (very small) chance that it could actually make you sick... people with compromised or weak immune systems (like an AIDS patient or some babies) could even concievably be killed by a live virus.

One alternative is a killed virus (flu shots are an example). These aren't entirely without risk... if you have a million virus particles in a sample and kill 99.9% of them (which would be pretty good in some circumstances), that still leaves a thousand of them to wreak havoc. Even if you are successful in killing ALL the viruses, because they're less like an actual infection they might be cleaned out of your system quickly and require several injections to be as effective as a single live virus.

Another possibility is using just a subunit of the virus (the herpes B vaccine is one of these). Viruses themselves are (simply stated) made of a protein shell wrapped around the DNA or RNA of the virus. With genetic engineering, we can sometimes have harmless cells produce a bunch of those proteins and make a vaccination with just those. Since there is absolutely nothing that could possibly infect you, these are 100% safe, though again the immune reaction tends not to be as strong or long-lasting.

Answer 2

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Answer 3

They take just what it says, a portion of the live viruses, shoot them in your blood steam & you'r body builds up ammunity to fight off the disease. The same for a dead virus. All shots do not have to contain a live virus to work against. it's a very SMALL bit of the virus tho. You don't even get sick from them. I just had a flu shot from a "dead" virus. I did get the chills, a head ache & the "site" was sore, but nothing an ibphrophen didn't handle & put a cold pack on the shot site. Was gone in an hr.Better than getting the flu this yr.!

Answer 4

vaccine is actually th weakened or dead form of the virus ur being vaccinated against. when it's introduced to the body, the white blood cells find a way t combat it so that should that type of virus re-enter the body, it will be able t fight it. i guess live virus immunization would mean then, that the virus is alive.

Answer 5

say you want a vaccine for smallpox. the doctor will inject a very similar strain of smallpox in you, the vaccine. your body will mount an attack against this strain and in the end will have immunity against the disease. therefore, when you are actually confronted with smallpox, your body has already fought it can you can recover much faster.