The Common Cold

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Abstract
THE accumulation of scientific information regarding the agent or agents that cause the common cold has been exceedingly slow. Many questions and problems confronting investigators twenty years ago remain with them today. What are the mechanisms of transmission of the disease from host to host? Is there a carrier state? Does the virus remain in the tissues continuously in a manner similar to the herpes simplex virus and produce infection only when the resistance of the host is altered, or is each infection an expression of a new contact with the agent? Does an immunity develop after an attack of . . .
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