COLD AND VIRUS INFECTIVITY 



possessing enzymic competence might provide clues to the nature of 

 the winter factor. 



SUMMARY 



Infectious influenza virus was considered to be characterized by 

 an enzymic potential capable of causing host cell damage. No effect 

 of cold upon infectious virus per se could be shown. Any influence 

 exerted by cold upon experimental influenza infections was shown to 

 be closely related to a host- induced effect. Host cell damage was be- 

 lieved to follow enzymic action upon muco- protein structures of the 

 cell. 



LITERATURE CITED 



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2. Andrewes, C. H. 1958. Symposium on the aetiology, spread and 



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spondence. 



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