A new word?
Hmmmm........sounds like something else.
When you travel to diff. countries, like Egypt, the people there are used to their water and food. but when tourists come, they get sick from their water. In Mexico, there are street vendors selling tacos or buritos. The locals eat it with no problem, but tourists from other countries become ill. The same when other people come to America, they eat american food and some cannot handle it because their body isn't used to that kind of food. That's why each country and race of people is different.
There are new strains of flus each year. They don't always know what kind it is and they don't know the right antibody for it. Now, don't say I said this, but I've heard, that because of the large amount of Laotian people in this area, they brought this new strain of flu with them.
I am just repeating stuff I read on the internet.