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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."

Thiruvananthapuram, Apr 22: Eleven more people tested positive for COVID-19 in Kerala with totalpositive cases in the State touching 437on Wednesday.

Two house surgeonsof the Kozhikode Medical college are among those who have tested positive for the virus.

The two had travelled outside the state,Chief Minister Pinarayi Vijayan told reporters.

Kannur reported seven cases, Kozhikode two, while one case each was reported from the districts of Kottayam and Malappuram.

Only one person tested negative.

The state has 127 active cases and 29,000 people are under observation, including 346 in hospitals.

Mumbai, Feb 10: Ankita Pisudde, a resident of Hinganghat town in Wardha, was critical after sustaining 40% burns on February 3 when she was set afire, allegedly by one Vikesh Nagrale (27) while she was on her way to college.

The 25-year-old woman lecturer who was set on fire by a stalker in Maharashtra’s Wardha district last week died at a hospital in Nagpur on Monday morning, a police official said.

Ankita Pisudde, resident of Hinganghat town in Wardha, had been critical after sustaining 35 to 40% “grade III” burns on February 3 when she was set afire allegedly by one Vikesh Nagrale (27) while she was on way to her college, they said.

She was undergoing treatment at the Orange City Hospital & Research Centre here, located around 75 km from Wardha.

“Doctors at the hospital declared her dead at 6.55 a.m. today,” Hinganghat’s police inspector Satyaveer Bandiwar said.

The woman sustained deep burn injuries on scalp, face, right upper limb, left hand, upper back, neck and eyes along with severe inhalational injuries, the hospital said in a medical bulletin on Monday.

She died of “septicemic shock” after suffering from deep dermal burns along with severe inhalational injuries, respiratory distress and related complications, it said.

Around 4 a.m. on Monday, her oxygen levels deteriorated inspite of ventilator support, coupled with decreasing urine output and reduction in blood pressure, the hospital said.

As part of immediate resuscitation measures, medicines were escalated to maintain the blood pressure and all feasible steps were taken to improve the oxygen levels in blood, but the patient remained “extremely critical”, it said.

“Around 6.30 a.m., she had bradycardia and inspite of prolonged cardiopulmonary resuscitation, the patient could not be revived and was declared dead at 6.55 a.m.,” it said.

The probable cause of death was “septicemic shock”, the bulletin added.

During her treatment, she underwent tracheostomy (creating an opening in neck to place a tube into the windpipe to allow air to enter the lungs), burn dressings, debridement and escharotomies, the hospital informed.

Debridement is a medical procedure to remove dead, damaged or infected tissue, while escharotomy is a surgical procedure used to treat full-thickness (third-degree) circumferential burns.

The woman’s parents and uncle were kept informed about her deteriorating health condition and death, the hospital said, adding that the body was later handed over to police for postmortem and other formalities.

After the woman’s condition deteriorated, the hospital informed about her critical status to Maharashtra Home Minister Anil Deshmukh, Wardha Guardian Minister Sunil Kedar, Nagpur Divisional Commissioner Sanjeev Kumar, Police Commissioner Bhushan Kumar Upadhyay, Wardha Collector Vivek Bhimanwar and Wardha Superintendent of Police Basavraj Teli.

Heavy security was deployed in Hinganghat to avoid any law and order problem following her death, the police said.

Several locals, mostly women and college students, took out a march in Wardha city last Thursday, demanding death penalty for the accused.

Home Minister Deshmukh visited the hospital on Tuesday and announced that the accused’s trial would be fast-tracked.

The State government last week flew Navi Mumbai-based National Burns Centre director Sunil Keswani to Nagpur to supervise the woman’s treatment.

It has also appointed well-known lawyer Ujjwal Nikam as special public prosecutor in the case.

According to the victim’s relatives, Nagrale, who was arrested within hours of the incident on February 3, had been harassing her for quite some time.

Nagrale and the woman were friends till two years ago when she severed ties with him due to his “irrational behaviour”, the police earlier said.

A special team led by Deputy Superintendent of Police Trupti Jadhav will probe the case, the Wardha Police said last week.