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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."

Hong Kong, Jan 3: Oil prices soared more than four per cent Friday following claims that the US had killed a top Iranian general, ratcheting up tensions between the foes and fuelling fears of a conflict in the crude-rich region.

The head of Iran's Quds Force, Qasem Soleimani, was hit in an attack on Baghdad international airport early Friday, according to Hased, a powerful Iraqi paramilitary force linked to Tehran.

Brent surged 4.4 per cent to USD 69.16 and WTI jumped 4.3 per cent to 63.84.

“Oil prices still have room for further upside as many analysts are still having to upgrade their demand forecasts to include a rather calm period on the trade front,” Moya said, referring to the warming trade relation between China and the United States.

“President Trump is likely to take a break on being ‘tariff man’ until we get beyond the presidential election in November.”

New Delhi, Jun 19: Delhi minister Satyendar Jain's health has deteriorated further. He is infected with the coronavirus. Jain has also been diagnosed with pneumonia. He is being shifted to an ICU.  According to doctors, Jain is now kept full-time on oxygen support as his oxygen saturation level has dipped.  

Jain was admitted to Rajiv Gandhi Super Speciality Hospital early Tuesday after running high fever and suffering a sudden drop in oxygen level. The 55-year-old leader's test result came positive on Wednesday evening after a second test. Jain was brought to the hospital and was administered a test for the novel coronavirus infection on Tuesday morning, for which he tested negative. But he still ran fever and showed symptoms, so another test was done after 24 hours of the first.

He will now be shifted Max Hospital in Saket and administered plasma therapy. 

Union Home Minister Amit Shah has also wished for Jain's speedy recovery.

On Thursday, Delhi Deputy Chief Minister Manish Sisodia took over the charge of health, PWD, power and other departments held by Jain. Jain will remain the cabinet minister without any portfolio in the Arvind Kejriwal government until he recovers. 

On Sunday, Jain attended a high-level meeting on the coronavirus situation in the national capital, chaired by Union Home Minister Amit Shah, which was also attended by Delhi Lt Governor Anil Baijal, Kejriwal, Sisodia and Union Health Minister Harsh Vardhan.