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These included injection site reactions, headache, pyrexia (fever), fatigue, back pain, myalgia and rash.—Ananya Bhattacharya, Quartz, 22 Dec. 2021 According to the US National Library of Medicine's MedlinePlus resource, a fever (aka, pyrexia) is technically a higher-than-normal body temperature.—Leah Groth, Health.com, 2 Apr. 2020 For many of these reactions, the FDA database uses medical terminology, such as pyrexia and dyspnoea for fever and labored breathing, respectively.—Ajc Homepage, ajc, 24 July 2017
Word History
Etymology
New Latin, from Greek pyressein to be feverish, from pyretos
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