The h1n1 virus has spread from mainland China to former province of Taiwan, amid mounting distrust of China, widely seen as the agressor. Taiwan has now spread the travel advisory to the 10th city/province of China, putting out level-2 travel advisories. H1N1 is the human version of the bird flu, and has been limited to China since the first documented case. This is an extremely deadly version of the flu, known for showing very few symptoms and having a death rate of about 90%. This puts strain on the already strained relationship between China and Taiwan, and could force other nations to take sides in a conflict they really didn't want to get involved in. This could also definitely lead to travel and trade restrictions with these nations and the rest of the world. Global outbreaks of H1N1 would be disastrous to infrastructure in the new global economy.

http://www.forbes.com/sites/russellflannery/2013/04/28/taiwan-expands-china-travel-warning-to-10th-city-and-province-as-h7n9-bird-flu-spreads/