I haven't seen anything in particular about it going from human to pig but, as it is a mix of American swine flu , European and Asian swine flu American bird flu and human flu , it is really incorrect to call it either pig flu or swine flu !!! but I should think it would pass as easily to pigs as it does to humans .I know that it is quite common for pig farmers to get pig flu from pigs ( just not this particular one ) and no doubt the farmers give their pigs flu too. The danger with this flu though is it's ability to hit the fit humans between 25-45 ish . It makes their very effective immune system attack the hosts body . Older or younger people have a less strong immune system that is incapable of killing the host , therefore they survive. The flu in pigs is fairly mild ,from what I have read so far . There is even doubt that it even came from pigs .. it may well have come from birds or even a human !!! The virulence and death rate are very hard to work out . Mexico being classed almost as a third world country , as far as the health system goes , it is therefore very difficult to say if the 150 deaths so far , are part of say 2,000 people who have the virus , or maybe they are part of 2,000,000 . If from the 2,000 then it is a very dangerous virus with a high death rate. If from the 2,000,000 then it is only a very mild form of virus and we will basically shrug it off. Time is the only way of finding out , and seeing how many die from known infected numbers. All we can hope is the number of deaths is very small and the number of infected very high . That means it is a very mild form ...fingers crossed
cheers
Russ