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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."

Abu Dhabi, Jun 2: The United Arab Emirates on Monday recorded 635 new coronavirus cases, taking the total number of infections in the country to 35,192, the UAE’s Ministry of Health and Prevention said in a statement carried by state news agency WAM.

The new cases were detected after the health authorities conducted 30,147 additional COVID-19 tests citizens and residents.

The ministry also announced that 406 more patients have fully recovered after receiving the necessary medical care, raising the total number of recoveries in the country to 18,338.

The announcement was made during the regular media briefing held in Abu Dhabi, wherein Dr. Amna Al Dahak Al Shamsi, official spokesperson for the UAE government, provided an update on coronavirus-related developments and measures taken to mitigate its impact.

During the briefing, Dr. Al Shamsi also announced the death of two patients from COVID-19, taking the total number of deaths in the country to 266.

"The number of COVID-19 cases still receiving treatment now stands at 16,588 from different nationalities," she added, noting that more than 650,000 COVID-19 tests have been conducted over the past two weeks.

"Since the onset of the crisis, the UAE has focused on select segments of society, primarily the elderly and patients with chronic diseases, in order to ensure they survive the crisis," she added.

"We believe it is particularly morally important to support and stand by them, provide them with their daily needs, and keep them from harm’s way," she added.

Dr. Al Shamsi asserted that all precautionary measures announced, including the updated fines and penalties, will be enforced against violators, including citizens and residents.

"The law does not differentiate between citizens and residents. We are living in one homeland, which is for all of us," she continued.

"Your safety and health are a priority. We must comply with all precautionary measures. Though restrictions have been relaxed, caution must continue to be exercised."

Dr. Al Shamsi also warned, "Recklessness may undermine the efforts made by our frontline defenders. It is the responsibility of every individual to support protective efforts to ensure the safety of all."