http://www.newfluwiki2.com/frontPage.doYou can take a look at the CDC and WHO visualization of how pandemics develop and are classified. Take a look, just so you're more familiar with it, as it may come up in the weeks ahead (click for bigger version.)
What Does The Swine Flu Outbreak Mean?http://www.dailykos.com/storyonly/2009/4/24/724231/-What-Does-The-Swine-Flu-Outbreak-MeanAlong the top are the WHO phases. We are currently in phase 3, and that corresponds with the Pandemic Alert Period. Skip the USG stages because they are not widely used. At the bottom, CDC has corresponding "intervals" for the graph, and they correspond to functional "what do I do and when" information about a potential pandemic. Moving from WHO phase 3 to 4 ("you are here") means moving from CDC interval "investigation" to "recognition". That's exactly where we are - investigation. But even so, should something untoward develop there'd be time do do some preparation before we moved into the "initiation" and the shit hits the fan "acceleration" interval, even if this goes sour some time in the near future.
However, moving from investigation to recognition (i.e., WHO phase 3 to 4, or movingt the right of the big red line) would trigger all sorts of changes and alarms and trip wires in pandemic plans developed by companies and countries, and that might have an effect on travel advisories. Some multinationals might call for ex-pats to return home, just as one example. Airlines and tourism might take an economic hit (that happened to Canada during the SARS epidemic in 2003, and Canadians are still sore at WHO for acting (in their view) too precipitously in issuing travel advisories.
All this is given to give you a flavor of the complex decision making that needs to go on. WHO will be meeting in emergency session to do just that, but it's not as easy as simply saying "be cautious", not when so many factors come into play. And for a look at school closures, I refer you to this previous post when we talked about exercises and seasonal cases in Hong Kong that closed their schools.
In the meantime, we'll be tracking it here (that's the wiki forum link above), along with the rest of the country, and we'll update periodically as needed. And if you want to know what preparations you can take, go here. It's a site we set up with Idaho's Emergency management team exactly for that reason. Or download this flu prep manual. We put it there so you could. This is an excellent opportunity to think about the unthinkable. And if nothing develops, you'll be better prepped for the next natural disaster that does happen.