Read the passage given below and answer the questions that follow Delhi All India 2010)
Despite all the research every one of us catches gold and most of us catch it frequently. Our failure to
control one of the commonest of all ailments sometimes seems ridiculous Medical science regularly
practises transplant surgery and has rid whole countries of such killing diseases as Typhus and the Plague
But the problem of common cold is unusually difficult and much has yet to be done to solve it. It is known
that a cold is caused by one of a number of viral infections har alleci the lining of the nose and other
passages leading to the lungs but the confusing vanety of viruses makes study and remedy very difficult. It
was shown in 1960 that many typical colds in adulis are caused by one or the other of a family of viruses
known as rhinoviruses, yet there still remain many colds for which no virus has as yet been isolated
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