The problem is that they are concern that the avian flu might "leap" across to an infected swine flu individual or animal and than the virus will merge and mutate to a even more complex avian-swine-human combined flu.
With the winter upon us in Australia, the winter flu is also floating around, this is pretty scary if it hits here. I mentioned this in the thread "qantas will die in 6 months" when the flu first pops up and members there dissed me for being alarmist and all dismiss it as mighty Qantas once again , will conquer all. Fact is, alot of flight attendants themsleves are afraid to contract any flu virus from passengers.
Expect sickies to go up on trips to America.
Anti viral like relenza and tamiflu only works if the symptoms are caught at the earliest stages of the infection, not when it is already progressing, all medicine are useless when the infection had progressed, as in mexico.