Well by common flu, I meant to the human flu, that killing thousand ppl every year.
That is still meaningless. Variants that can't live in humans don't kill people. And there are ones which can only deal with surviving in a Dog or Horse, or Rat.
Flu transmission works, and this is a super simple version. I goes from one animal in a species to another. Then it mutates, in just the right way at just the right time and some other species picks it up, and if everything is in place, that animal infects another. It does take a lot of things to align for this to happen, but with, what 4 billion people, on this planet it does happen.
There isn't a common flu, or a human flu or anything like that. If there was we would make a shot which had the right proteins in it and we would be done. Every so often it mutates, and gets a new new protein coat on it, and that causes it to not be noticed by current species and it goes on and infects more. Influenza mutates periodically so it's hard to eliminate. There are other virus which don't, polio comes to mind. Which is why we have a polio vaccine.
That is why there is a new flu shot every year. What you get a dose of the current killed viri and the idea is your body goes "oh I'm going code to kill that." So when the real live thing comes along your immune system already knows about it. It's like a firedrill for your immune system, this won't make you sick but your body learns what to do if the real thing comes along.
Swine flu comes from that fact that we believe it jumped from a Pig; Avian because we believe it came from chickens. There are also some genetic markers which they use now. Those are the two most common carriers, due to humans living in close contact with both of them.
johno
) a doctor stated that why we're hearing about the positive cases NOW is because nearly every person exhibiting what may be symptoms is being tested to find out if, in fact, they are ill with swine flu and he went on to state that it's believed it's been making people ill for quite some time and in majority of cases there were no complications and no deaths resulting and he felt our immune systems have been more exposed to it ( and some of us may have even had it ) then anyone is thinking. Hope so.
