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. 2003 Mar 15;36(6):714–723. doi: 10.1086/367844

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© 2003 by the Infectious Diseases Society of America

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Comparison of the cumulative distribution of total symptom severity scores, by time point, in 105 patients with natural colds and 141 subjects with experimental colds. A, Day 1 of illness for natural colds compared with 24 h after inoculation for experimental colds. B, Day 1 of illness for natural colds compared with 48 h after inoculation for experimental colds.