'If Indira praised for 1971, why not Modi for Balakot'

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."

New Delhi, May 30: An Air India flight from Delhi to Moscow on Saturday had to return midway after the airline's ground team found out that one of the pilots had tested positive for novel coronavirus, officials said.

"When the A320 plane, which did not have any passengers as it was heading to Moscow to bring back stranded Indians under Vande Bharat Mission, had reached Uzbekistan's airspace, our team on ground realised that one of the pilots had tested COVID-positive," senior Air India officials said.

"The flight was immediately asked to return. It came back to Delhi at around 12.30 pm on Saturday," the officials said. The crew has been quarantined. Another plane would be sent to Moscow to bring back the stranded Indians, according to the officials.

New Delhi, Jan 4: In more troubles for the former Finance Minister and senior Congress leader P Chidambaram, the Enforcement Directorate (ED) on Friday questioned him for over six hours in its probe into the Air India aircraft deal case, first time since his release from Tihar jail almost a month ago.

A senior ED official told IANS, "We questioned Chidambaram for over six hours today in the ongoing probe into the Air India deal with Airbus."

According to financial probe agency officials, Air India had planned to buy over 111 aircraft from Airbus and Boeing during the erstwhile United Progressive Alliance (UPA) government in 2009. This is the first time the ED has questioned the senior Congress leader in the Air India deal case.

The questioning of Chidambaram came for the first time since his release from the Tihar jail where he spent 106 days in connection with the INX Media money laundering case. He was released from Tihar on December 4 last year after he was granted bail by the Supreme Court. The former finance minister is also being investigated by the ED in a separate money-laundering cases of Aircel-Maxis deal.

An ED official said the contract to buy 43 aircraft from Airbus was finalised by a panel of ministers headed by Chidambaram in 2009. According to the ED, when the proposal to buy 43 aircraft from Airbus was sent to the Cabinet Committee on Security (CCS), there was a condition that the aircraft manufacturer would have to build training facilities and MRO (Maintenance, Repair and Overhaul) centres at a cost of Rs 70,000 crore. But later, when the purchase order was placed, the clause was removed.

The name of another UPA minister, Praful Patel, had also come up in the alleged scam in a charge sheet filed by the ED against corporate lobbyist Deepak Talwar on March 30 last year. Talwar was arrested last year by the ED after he was deported from the UAE.

The ED is probing the Air India-Indian Airlines merger; purchase of 111 aircraft from Boeing and Airbus at Rs 70,000 crore; ceding profitable routes and schedules to private airlines, and opening of training institutes with foreign investment.