1. Chimpanzees are highly suitable animals for the experimental study of human upper respiratory infections.
2. Human colds have been successfully transmitted to apes and human volunteers in 44 per cent of instances tried by means of filtered nasal washings obtained from colds.
3. Certain types of infectious colds are caused by a filtrable agent.
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Copyright, 1930, by The Rockefeller Institute for Medical Research New York
1930
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