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."
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The day is not too long to fight for Muslim Freedom/Indipendent - India will FIRE....
That means bakht indian are easily fooled by their cheddi leaders from knowing the TRUTH of WORSHIPING ONE GOD... (NA TASYA PRATIMA ASTI) and these cheddis very easily CONTROL these IGNOrANTS of their GOD given LIFE and BLIND them from understanding their own religion .... Swami AGNIVESH is telling the TRUTH but cheddis blinded the Bhakts so shakuningly that they ignored truth and and stand with the cheddis cos of their religious IGNORANT... Learn from AGNIWESH, cow is not your mother or God its an ANIMAL created by ONE MERCIFUL GOD for human sustenance thru milk or meat... Human beings are an intelligent creation of GOD, if they dont try to know this ONE GOD who created all that exists, then they are really easily FOOLED by the evils of the Society. Wake up guys dont be FOOLS of our time
Yea there is no wonder if one day may afgan talaban enters india to sacrifice their life to protect muslims from crime of saffron talaban killings of innocent muslims.
Well said Mr. Taroor. You are totally right. Even its dung has value also.
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