How can 200 or more viruses all cause the same disease, the cowmen cold? the answer is that they don's - arid symptoms are in fact caused by our immune system's response to the virus.rnViruses that break through our defences usually start replicating in the cells lining the throat, which is why you feel irritation and pain there first Sore throats often feel as if the very tissue is being destroyed, but this seldom happens with a cold.
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