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19 answers

because the virus evolves and becomes resistant to previous vaccines very quickly, hence you need a new one every year.

2007-02-17 15:16:26 · answer #1 · answered by ? 6 · 4 1

It is through a process known as natural selection. When the virus replicates itself, there are always a few strains that have a slightly changed gene or slight variation in the genetic code. This may allow the organism to be more "fit" than it's relatives and therefore give it a higher chance of surviving. Once the others die off, then there is only the ones that have the variation that survive. That is evolution. In the case of flu, we can see these changes very rapidly simply because they reproduce so frequently.

2007-02-18 01:17:50 · answer #2 · answered by inuyasha564 2 · 0 0

It would take a bit more space...

One thing to point out is that without the change in the environment (ie a vaccine) the eventual new strain of the flu would probably have been eliminated after a generation or two, it would have conferred no advantage. It is only precisely because of the vaccine that the new strain become predominant in the following year.

And the tired old rubbish that Lt Dan et al come up with just shows how trying to explain is a waste of time, yeah god did it...

2007-02-17 23:22:30 · answer #3 · answered by fourmorebeers 6 · 0 0

That is going to be tough. Because it is an example of a small mutation in an organism or life form. To extrapolate that this proves evolution is like saying "my dirt road in front of my house evolved into a freeway."
It makes no sense does it? Show me a single cell organism then make it evolve into a living breathing animal or human by evolution. I want to see the friction ridges of the skin evolve, the sense of hearing, inner ear equilibrium for balance, etc.
Now when you can do that randomly, I will be very impressed indeed. The more you examine the human body or animals the more you have to ponder intelligent design. I am sorry this opposes your dogma, but it just doesn't add up.

2007-02-17 23:20:32 · answer #4 · answered by Anonymous · 0 2

flu shots need to be redone every year because the virus has mutated and the old antibodies won't work anymore. showing how organisms naturally change. Thier life cycle is only a few days so you get many more generations and faster change in these little organisms.

2007-02-17 23:19:08 · answer #5 · answered by Anonymous · 1 0

To evolve is to progress. The field of medicine evolves every time they find a cure for an ailment of any kind.

I believe what some are looking for here is the word mutation which is what the flu virus does when it passes from one person to another.

2007-02-17 23:17:49 · answer #6 · answered by JAN 7 · 1 0

Yep, every year they have to make brand new flu shots because the old flu shots won't work anymore, because the influenza virus develops resistances to various things, and finds new ways to attack our bodies. Evolution.

2007-02-17 23:19:06 · answer #7 · answered by gimmenamenow 7 · 1 0

New flu vaccines have to be made every season because the influenza virus mutates (changes) rapidly, so the vaccine from one season is not effective against the influenza strain that is active the next season.

2007-02-17 23:17:51 · answer #8 · answered by MissAnthropic 2 · 1 0

My atheist fellows did, oh well.

Evidence of evolution: The mutations improve the viruses' ability to survive because old flushots are resisted by mutated viruses

2007-02-17 23:20:48 · answer #9 · answered by Anonymous · 0 0

Viruses mutate and reproduce quickly. That is why there many strains and new flu shots are needed for the new strains that develop each year.

2007-02-17 23:16:47 · answer #10 · answered by G's Random Thoughts 5 · 3 0

yeah, the flu bug mutates (evolves) rapidly so we have to invent a new formula every year for its likely progeny. It is like human evolution speeded up. so too do fruit flies evolve quickly , that is why they are favorites for study.

2007-02-17 23:17:39 · answer #11 · answered by Anonymous · 1 0

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