Coincidence or worrying?

Don't know if this is just a coincidence but...
2007 - Chinese year of the Chicken - Bird Flu Pandemic devastates parts of Asia
2008 - Chinese year of the Horse - Equine Influenza decimates Australian racing
2009 - Chinese year of the Pig - Swine Flu Pandemic kills hundreds of pigs around the globe.
Has any one else noticed this?
It gets worse...
next year...
2010 - Chinese year of the Cock - what could possibly go wrong?