Ahead of general election, possibility of communal violence in India: US spymaster

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 1: The Centre has finalsed the criteria for delimitation of various zones after May 3. It has identified at least 130 districts as red zones, 284 orange zones and 319 green zones.

According to a letter written by Health Secretary Preeti Sudan to the Chief Secretaries of all States and UTs, all the states have to delineate the containment areas and buffer zones in the identified red and orange zone districts and notify the same.

The letter said, the national capital has at least 11 red zones, Uttar Pradesh 19 red zones, 36 orange zones and 20 green zones while, the state of Haryana has 2 red zones, 18 orange zones and 2 green zones.

The Gautam Buddha Nagar in Uttar Pradesh has been identified as a red zone district while, Ghaziabad has been designated as an orange zone. The national capital has no orange and green zone; there are only red zones according to the letter.

In Maharashtra, Mumbai, Pune, Thane, Nashik come in the red zone.

In West Bengal, Kolkata, Howrah, 24 Parganas -- both North and South have been identified as red zones while Hooghly, Nadia, Murshidabad etc have been marked as orange zones.

In the southern part of India, Kerala has 2 red zones and 10 orange zones, while Tamil Nadu has 12 red zones and 24 orange zones.

The Health Secretary said that the list will be revised on a weekly basis or earlier and communicated to states for further follow-up action in consonance with the directions issued by the Ministry of Home Affairs under the Disaster Management Act, 2005 based on field feedback and additional analysis at state level, states may designate additional red or orange zones as appropriate.

However, states may not relax the zonal classification of districts classified as red or orange as communicated by the Ministry. This classification is multi-factorial and takes into consideration incidence of cases, doubling rate, extent of testing and surveillance feedback to classify the districts.

A district will be considered under green zone, if there are no confirmed cases so far or there is no reported case since the last 21 days in the district.

New Delhi, Jun 7: Rain lashed some parts of the Delhi-NCR on Sunday morning.

The India Meteorological Department (IMD) has predicted partly cloudy sky with possibility of development of thunder lightning for three days from June 10 onwards with minimum and maximum temperature will hover around 29° Celcius and 42° Celcius respectively.

Strong surface winds during day time have been predicted for today by IMD.