So, why do some people get sick in certain situations while some do not? A person gets sick when the pathogenic influence is strong (an extremely cold or windy environment, for example) or when the body’s defenses are weak. Although it was not formally called the immune system, there has long been a concept in Chinese medicine called defensive energy (or wei Qi) which is responsible for keeping one healthy and preventing illness and sickness from occurring. Chinese medical theory holds that if the defensive energy is weak, even a mild pathogenic influence would be able to invade the body.
Even though these herbs were initially prescribed long before viruses were discovered, pharmacological and clinical research has shown that they have antiviral and antibiotic properties. Similarly, the key ingredient in Tamiflu, a drug made by Swiss drug giant Roche aimed at treating bird flu, is derived from the seeds of star anise, a star shaped fruit which is a household Asian spice.
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