“…
The role of viruses in the genesis of respiratory infection is being inc_reasingly recognized. Grist and Somerville (1959) investigated 1,000 cases in hospital and general practice, suffering from acute respiratory illness, and found 46 who showed serological evidence of virus infection. Gardner and others ( 1960) similarly examined the role of both virus and bacteria in acute respiratory disease in 195 children admitted to Newcastle hospitals.
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