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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."

Mumbai, Jan 18: Maharashtra Tourism Minister Aaditya Thackeray on Friday said shops, restaurants, malls and pubs will remain open 24 hours on an experimental basis in a few areas of Mumbai from January 26.

The areas where these establishments will remain open all night are Fort and Kala Ghoda in south Mumbai and Bandra Kurla Complex in the west.

Thackeray had batted for all-night-open eateries and other establishments in the city during the earlier BJP-Shiv Sena regime too.

May 27: At a time when India is struggling with the deadly coronavirus, huge swarms of locusts in many states has bought nightmares to the farmers.

Experts warn of extensive crop losses if authorities fail to curb the fast-spreading swarms by June when monsoon rains spur rice, cane, corn, cotton, and soybean sowing.

Locusts entered India after traveling from Africa through Yemen, Iran and Pakistan.

After massive devastation in Pakistan, t swarms of locusts entered India through Rajasthan and Gujarat. The number is so large that the farmers and authorities are feeling helpless in tackling the threat.

The situation has become more alarming as the locusts is spreading across the country at an extremely fast rate. After badly affecting the crops in Rajasthan, Gujarat, Maharashtra, and Madhya Pradesh, the swarm of locust have now entered Uttar Pradesh.

In Rajasthan alone, the locust attack has damaged 5 lakh hectares of crop and nearly 17 districts of Madhya Pradesh have also seen their terror. Earlier from May 2019 to February 2020, too, the locust swarms entered India several times.

Speaking on the current situation, Dr Ram Pravesh, District Agricultural Officer, Agra, Uttar Pradesh said the Department of Agriculture is working with farmers in dealing with the situation. He urged the farmers to inform their Mandal Krishi Adhikari if they require any help.

India's largest-ever locust attack was in 1993 when more than three lakh hectares of cultivated land were completely destroyed.

Earlier in 2020, farmers salvaged their wheat and oilseed crops from a previous locust scourge.