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London/Milan, Jun 2: World Health Organization experts and a range of other scientists said on Monday there was no evidence to support an assertion by a high profile Italian doctor that the coronavirus causing the COVID-19 pandemic has been losing potency.

Professor Alberto Zangrillo, head of intensive care at Italy's San Raffaele Hospital in Lombardy, which bore the brunt of Italy's COVID-19 epidemic, on Sunday told state television that the new coronavirus "clinically no longer exists".

But WHO epidemiologist Maria Van Kerkhove, as well as several other experts on viruses and infectious diseases, said Zangrillo's comments were not supported by scientific evidence.

There is no data to show the new coronavirus is changing significantly, either in its form of transmission or in the severity of the disease it causes, they said.

"In terms of transmissibility, that has not changed, in terms of severity, that has not changed," Van Kerkhove told reporters.

It is not unusual for viruses to mutate and adapt as they spread, and the debate on Monday highlights how scientists are monitoring and tracking the new virus. The COVID-19 pandemic has so far killed more than 370,000 people and infected more than 6 million.

Martin Hibberd, a professor of emerging infectious disease at the London School of Hygiene & Tropical Medicine, said major studies looking at genetic changes in the SARS-CoV-2 virus that causes COVID-19 did not support the idea that it was becoming less potent, or weakening in any way.

"With data from more than 35,000 whole virus genomes, there is currently no evidence that there is any significant difference relating to severity," he said in an emailed comment.

Zangrillo, well known in Italy as the personal doctor of former Prime Minister Silvio Berlusconi, said his comments were backed up by a study conducted by a fellow scientist, Massimo Clementi, which Zangrillo said would be published next week.

Zangrillo told Reuters: "We have never said that the virus has changed, we said that the interaction between the virus and the host has definitely changed."

He said this could be due either to different characteristics of the virus, which he said they had not yet identified, or different characteristics in those infected.

The study by Clementi, who is director of the microbiology and virology laboratory of San Raffaele, compared virus samples from COVID-19 patients at the Milan-based hospital in March with samples from patients with the disease in May.

"The result was unambiguous: an extremely significant difference between the viral load of patients admitted in March compared to" those admitted last month, Zangrillo said.

Oscar MacLean, an expert at the University of Glasgow's Centre for Virus Research, said suggestions that the virus was weakening were "not supported by anything in the scientific literature and also seem fairly implausible on genetic grounds."

Jaipur, Mar 11: A 85-year-old man in Jaipur, who had returned from Dubai on February 28, has tested positive for coronavirus, a state government official said on Wednesday.

He was found presumptive positive in the first test on Tuesday and hence, a second test was conducted with fresh samples, the reports of which arrived late Tuesday night, Additional Chief Secretary, Medical and Health, Rohit Kumar Singh, said.

“The man who travelled to Dubai has been tested positive for coronavirus. It has been confirmed now,” Singh said.

“We have also got the manifest of the Spicejet flight he took from Dubai to Jaipur and are doing due diligence on that,” the official said, adding that intense contact tracing was underway.

The man has been kept in isolation at the SMS Hospital here.

“The man came to the hospital on Monday with symptoms of the virus. After the first test, his wife and son too have been kept in isolation at the hospital. The two, however, do not have coronavirus affliction symptoms,” Singh said.

A total of 235 people who came in contact with the octogenarian and his family have already been traced and are being monitored, he said.

Other contacts are also being traced, Singh added.

An Italian couple, who tested positive for COVID-19 last week, are also admitted in the hospital but their condition is improving, he said.

Jun 19: Billionaire Mukesh Ambani on Friday announced that his oil-to-telecom conglomerate Reliance Industries is now net debt-free after raising a record Rs 1.69 lakh crore from global investors and a rights issue in under two months.

Reliance raised Rs 1.15 lakh crore from global tech investors by selling a little less than a quarter of the firm's digital arm, Jio Platforms Ltd, and another Rs 53,124.20 crore through a rights issue in the past 58 days.

Taken together with last year's sale of 49 per cent stake in fuel retailing venture to BP Plc of UK for Rs 7,000 crore, the total fund raised is in excess of Rs 1.75 lakh crore, the company said in a statement.

Reliance had a net debt of Rs 1,61,035 crore as on March 31, 2020. "With these investments, RIL has become net debt-free," it said.

"I have fulfilled my promise to the shareholders by making Reliance net debt-free much before our original schedule of March 31, 2021," Ambani said.

Jio Platforms - which houses the country's youngest but largest telecom firm Reliance Jio, raised Rs 1,15,693.95 crore from leading global investors including Facebook, Silver Lake, Vista Equity Partners, General Atlantic, KKR, Mubadala, ADIA, TPG, L Catterton and PIF since April 22, 2020.

Saudi Arabian sovereign wealth fund PIF buying 2.32 per cent stake in the unit for Rs 11,367 crore on June 18 "marks the end of Jio Platforms' current phase of induction of financial partners," the statement said.

Alongside, Reliance launched India's biggest right issue, which was subscribed to 1.59 times.

Though the rights issue size was Rs 53,124 crore, the company has got only 25 per cent of the money as the remaining is to be paid only next fiscal.

Ambani had at the company's annual general meeting on August 12, 2019, announced a roadmap for Reliance to become a net debt-free company before March 31, 2021.

"We have a very clear roadmap to becoming a zero net-debt company within the next 18 months that is by March 31, 202," he had said last year highlighting strong interest from strategic and financial investors in consumer businesses, Jio and Reliance Retail.

In the statement on Friday, he said he was both delighted and humbled to announce the fulfillment of the promise.

"Exceeding the expectations of our shareholders and all other stakeholders, again and yet again, is in the very DNA of Reliance," he said.

"Therefore, on the proud occasion of becoming a net debt-free company, I wish to assure them that Reliance in its Golden Decade will set even more ambitious growth goals, and achieve them," he added.

He said over the past few weeks, phenomenal interest was received from the global financial investor community in partnering with Jio.

"As our fundraising milestone from financial investors is achieved, we sincerely thank the marquee group of financial partners and warmly welcome them into Jio Platforms," he said.

"I also express my heartfelt gratitude to all the retail and institutional investors, both domestic and foreign, for their overwhelming participation in our record-setting Rights Issue," he added.