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Loss of taste and smell key COVID-19 symptoms, app study finds

Losing your sense of smell and taste may be the best way to tell if you have COVID-19, according to a study of data collected via a symptom tracker app developed by scientists in Britain and the United States to help monitor the coronavirus pandemic.

Almost 60% of patients who were subsequently confirmed as positive for COVID-19 had reported losing their sense of smell and taste, data analysed by the researchers showed.

That compared with 18% of those who tested negative.

These results, which were posted online but not peer-reviewed, were much stronger in predicting a positive COVID-19 diagnosis than self-reported fever, researchers at King’s College London said.

The app, which the researchers say could help slow the outbreak and identify more swiftly those at risk of contracting COVID-19, can be downloaded via the URL covid.joinzoe.com.

If enough people participate in sharing their symptoms, the scientists said, the app could also provide healthcare systems with critically valuable information.

“This app-based study is a way to find out where the COVID-19 hot spots are, new symptoms to look out for, and might be used as a planning tool to target quarantines, send ventilators and provide real-time data to plan for future outbreaks,” said Andrew Chan, a professor of medicine at Harvard Medical School in the United States who is co-leading the study.

Of 1.5 million app users between March 24 and March 29, 26% reported one or more symptoms through the app. Of these, 1,702 also reported having been tested for COVID-19, with 579 positive results and 1,123 negative results.

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Meeta Ramnani
Meeta Ramnani
Meeta develops credible content about various markets based on deep research, opinions from experts and inputs from industry leaders. As the managing editor at Smart Industry News, she assures that every piece of news and article adds to the knowledge of decision makers. An avid bike rider, Meeta, is a postgraduate from Indian Institute of Journalism and New Media (IIJNM) Bangalore, where her specialization was Business Journalism. She carries experience from mainstream print media including The Times Group and Sakal Media Group.
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