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This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
Allbutt’s clinical mercury thermometer. (The Museum of the History of Science, Technology and Medicine at the University of Leeds. Photo and with permission from Professor Francis Ring, the University of Leeds)