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Los Angeles, Apr 28: People who experience loss of smell as one of the COVID-19 symptoms are likely to have a mild to moderate clinical course of the disease, according to a study which may help health care providers determine which patients require hospitalisation.

The findings, published in the journal International Forum of Allergy & Rhinology, follows an earlier study that validated the loss of smell and taste as indicators of infection with the novel coronavirus, SARS-CoV-2.

According to the scientists from the University of California (UC) San Diego Health in the US, patients who reported loss of smell were 10 times less likely to be hospitalised for COVID-19 compared to those without the symptom.

"One of the immediate challenges for health care providers is to determine how to best treat persons infected by the novel coronavirus," said Carol Yan, first author of the current study and rhinologist from the UC San Diego Health.

"If they display no or mild symptoms, can they return home to self-quarantine or will they likely require hospitalisation? These are crucial questions for hospitals trying to efficiently and effectively allocate finite medical resources," Yan said.

The findings, according to the researchers, suggest that loss of smell may be predictive of a milder clinical course of COVID-19.

"What's notable in the new findings is that it appears that loss of smell may be a predictor that a SARS-CoV-2 infection will not be as severe, and less likely to require hospitalisation," Yan said.

"If an infected person loses that sense, it seems more likely they will experience milder symptoms, barring other underlying risk factors," she added.

Risk factors for COVID-19 previously reported by other studies include age, and underlying medical conditions, such as chronic lung disease, serious heart conditions, diabetes, and obesity.

In the current study, the scientists made a retrospective analysis between March 3 and April 8 including 169 patients who tested positive for COVID-19 at UC San Diego Health.

They assessed olfactory and gustatory data for 128 of the 169 patients, 26 of whom required hospitalisation.

According to the researchers, patients who were hospitalised for COVID-19 treatment were significantly less likely to report anosmia or loss of smell -- 26.9 per cent compared to 66.7 per cent for COVID-19-infected persons treated as outpatients.

Similar percentages were found for loss of taste, known as dysgeusia, they said.

"Patients who reported loss of smell were 10 times less likely to be admitted for COVID-19 compared to those without loss of smell," said study co-author Adam S. DeConde.

"Moreover, anosmia was not associated with any other measures typically related to the decision to admit, suggesting that it's truly an independent factor and may serve as a marker for milder manifestations of Covid-19," DeConde said.

The researchers suspect that the findings hint at some of the physiological characteristics of the infection.

"The site and dosage of the initial viral burden, along with the effectiveness of the host immune response, are all potentially important variables in determining the spread of the virus within a person and, ultimately, the clinical course of the infection," DeConde said.

If the SARS-CoV-2 virus initially concentrates in the nose and upper airway, where it impacts olfactory function, that may result in an infection that is less severe and sudden in onset, decreasing the risk of overwhelming the host immune response, respiratory failure, and hospitalisation, the scientists added.

"This is a hypothesis, but it's also similar to the concept underlying live vaccinations," DeConde explained.

"At low dosage and at a distant site of inoculation, the host can generate an immune response without severe infection," he added.

Loss of smell, according to the study, might also indicate a robust immune response which has been localised to the nasal passages, limiting effects elsewhere in the body.

Citing the limitations of the study, the scientists said they relied upon self-reporting of anosmia from participants, which posed a greater chance of recall bias among patients once they had been diagnosed with COVID-19.

They added that patients with more severe respiratory disease requiring hospitalisation may not be as likely to recognise or recall the loss of smell.

So the researchers said more expansive studies are needed for validating the results.

San Francisco, Mar 18: Facebook said a bug in its anti-spam system temporarily blocked the publication of links to news stories about the coronavirus. Guy Rosen, Facebook's vice president of integrity, said on Twitter Tuesday that the company was working on a fix for the problem.

Users complained that links to news stories about school closings and other information related to the virus outbreak were blocked by the company's automated system.

Later on Tuesday, Rosen tweeted that Facebook had restored all the incorrectly deleted posts, which also covered topics beyond the coronavirus.

Rosen said the problems were unrelated to any changes in Facebook's content-moderator workforce. The company reportedly sent its human moderators home this week because of the coronavirus outbreak.

A representative for Facebook did not immediately respond to questions on the status of Facebook's content moderators, many of whom do not work directly for the company and are not always able to work from home.

New Delhi, Jan 17: E-commerce major Amazon on Friday said it plans to create one million new jobs in India over the next five years through investments in technology, infrastructure and its logistics network.

These jobs are in addition to the seven lakh jobs Amazon's investments have enabled over the last six years in the country.

"Amazon plans to create one million new jobs in India by 2025," the company said in a statement, adding that the jobs - created both directly and indirectly - will be across industries, including information technology, skill development, content creation, retail, logistics, and manufacturing.

Amazon.com Inc chief Jeff Bezos had on Wednesday announced USD 1 billion (over Rs 7,000 crore) investment in India to help bring small and medium businesses online and committed to exporting USD 10 billion worth of India-made goods by 2025.

"We are investing to create a million new jobs here in India over the next five years," Bezos said.

"We’ve seen huge contributions from our employees, extraordinary creativity from the small businesses we've partnered with, and great enthusiasm from the customers who shop with us—and we’re excited about what lies ahead," Bezos added.

India has prioritised job creation and skilling initiatives – including the training of more than 400 million people by 2022 – in rural and urban areas.

"Amazon’s job creation commitment and investment in traders and micro, small and medium enterprises (MSMEs) complement this social inclusion and social mobility efforts by creating more opportunities for people in India to find employment, build skills, and expand entrepreneurship opportunities," the statement said.

The new investments will help to hire talent to fill roles across Amazon in India, including software development engineering, cloud computing, content creation, and customer support.

Since 2014, Amazon has grown its employee base more than four times, and last year inaugurated its new campus building in Hyderabad – Amazon’s first fully-owned campus outside the United States and the largest building globally in terms of employees (15,000) and space (9.5 acres).

The investments will also help in expanding growth opportunities for the more than 5,50,000 traders and micro, small, and medium-sized businesses – including local shops – through programs like Saheli, Karigar, and “I Have Space”.