On April 21, 2020, the Centers for Disease Control and Prevention (CDC) and on May 5, 2020, the World Health Organisation added 'new loss of taste or smell' to their list of symptoms related to Covid-19, respectively. Public Health England (PHE) only included loss of smell and taste as official symptoms on May 20th . However, whether individual hospitals were including smell and taste disturbances in their initial work-up for Covid-19 diagnosis is unknown.
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Lechner et al. (2020) studied this question.
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