The living habits of westerners are different from those of China. Westerners like cold drinks, raw food, staying up late, meat, air conditioning and so on. These things make the body full of yang and heavy moisture. Yang Qi and moisture provide the breeding conditions for influenza. So westerners are prone to get the flu.

People in China like tea, cooked food and whole grains. Especially whole grains, can dispel dampness. The constitution caused by these living habits is not suitable for the breeding of influenza.

But westerners have a good habit of sunbathing. Sunbathing can replenish yang. China people are not forced by life and will not take the initiative to bask in the sun. More sunshine in summer can prevent colds in autumn and winter, which is scientifically based.