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The way I understand it is the virus mutations take place in the ducks. A virolent strain then catches on and spreads amongst the birds. This flu cannot be spread from the birds to people. On small farms where ducks and pigs are raised in close proximity the flu is contracted by the pigs from the birds.It spreads amongst the pigs and people can get it from the pigs. Once it jumps to the people it spreads from people to people rapidly. IMO airplanes are are like incubators. Everyone on the plane could get exposed from a single passenger on board who has it. Often the virus spreads most rapidly when its first cotracted and before the more visible symptoms are abovious like fever , sinus inflamation , body aches. So anyway , i think the idea that we can stop it from spreading to the US is not too sound.
The interesting thing is that in a poor country like Mexico, where many do not have access to good medical care, many people die from it. So far in the USA there have been no fatalities (as of the last news reort I heard) and that is mostly because peole get faster and better care here.
Anyway , its something to be conscious of but I wouldn't let it rule my life. If you get sck with the typical chills and bady aches that usually mean more than a simple cold , go to the doctor. At least keep an eye out for secondary bacterial infections that result from the virus. very typically the nasal and respiratory infections do happen and they are what i think bring peole down , especially pneumonia.
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