Airlines all over the world are taking precautions in an attempt to curb the spread of swine flu as airline stocks fell worldwide.

China has suspended all its flights to the country where more than 300 people have contracted the disease. Chinese health officials have made it very clear to the Mexican authorities that flights would be resumed only when the situation improves. Chinese authorities are also trying to track the co-passengers of the man who stopped at Shanghai before heading to Hong Kong where he was found to have been infected with the virus. While they have quarantined the crew and those passengers they have been able to trace, 11 untraceable passengers are causing anxiety in China.