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NUTRITIONAL DEFICIENCIES CAUSE DEFENSES TO FALTER
But such a massive build-up is possible only when sufficient amounts of zinc and other nutrients are on hand and when immunocompetence is high. The competence of our immune system in destroying invaders is a reflection of our own physical and mental health. When we exercise regularly, eat lots of fruits and vegetables, and have a positive, upbeat and hopeful attitude, our immunocompetence is enhanced.
Had human’s lifestyle been built around such factors, his immune system might have conquered the cold in just a day or two. Unfortunately, human had been recently divorced. He seldom exercised any more. He lived largely on hamburgers, coffee and fast foods. And he often experienced bouts of lingering depression. As a result, his immunocompetence was so suppressed that his cold lingered on for twelve misery-filled days before his immune system was finally able to erase it.
Regardless of how competent is one’s immune system, however, the same step-by-step conflict occurs as in human’s case. The only difference is the speed at which the body girds itself and fights back. A person with really high immunocompetence may be able to throw off a cold by the second day.
But no matter how high one’s immunocompetence, in the beginning the immune system is largely unprepared and helpless to stop the tidal wave of beseiging viruses. Millions of rhinoviruses were now in contact with the cells lining human’s nasal passages. Most were able to bind on to receptors in the host cell’s wall.
In response to the pressure on its surface, each cell puckered up around the virus and—possibly believing it to be a nutrient—innocently absorbed the micro-organism into its cytoplasm. In the process, each host cell released enzyme that removed the virus’s protein coat. This left the virus core exposed, a tiny piece of translucent RNA (ribonucleic acid) containing its genetic code for reproduction.
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