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Australian study shows coronavirus is “very well adapted” to infect humans – Observer

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Sars-Cov-2, the virus behind the Covid-19 pandemic, is “Very well adapted” for infecting human cells, is much more effective than its ability to infect the cells of other animals, such as bats. The idea was proposed by a group of Australian scientists who published a study in Scientific Reports, cited by Daily telegraph Australian.

Leading scientists associated with the Universities of Flinders (Adelaide) and La Trobe (Melbourne) have used supercomputers to create models of how the virus attacks the cell receptors (receptor proteins) of various animal species. The goal was to explore the theory that the coronavirus passed from an animal like a bat to a human, possibly through a different species (pangolin was one of the advanced hypotheses from the beginning).

However, research has shown that protein spike the new coronavirus attacked human cells more effectively than any other species tested. “Computer simulations have shown that the ability of the virus to bind to the ACE2 protein bat is weak compared to the ability to attach to human cells, ”commented one of the academic epidemiologists in charge of the study, Nikolai Petrovsky.

For this expert, this is a scientific hypothesis that “contradicts the idea that the virus was transmitted directly from bats to humans.” “Therefore, if a virus is of natural origin, it can only reach humans through an intermediate species,” the specialist believes, “however,“ this species has not yet been discovered ”.

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In the case of pangolins, whose intervention was at some point ruled out by Chinese researchers, these experts considered the results of the experiments “intriguing.” But in other cases already mentioned as possibilities, such as dogs or cats, it has not been demonstrated that the ease of infection is minimally comparable to that of humans. The study is available at this link.

Three researchers from Wuhan reportedly went to the hospital with symptoms before the outbreak was reported, but China denies

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“Insidious wave” killed a passenger and injured four people during a cruise

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UOne person died and four were injured after a giant wave hit a cruise ship in Antarctica on Wednesday during a storm.

The cruise was bound for Ushuaia, Argentina – the main starting point for expeditions to Antarctica – when the “killer wave incident” occurred, according to a report by cruise line Viking Polaris quoted by CBS News this Friday.

“It is with great sadness that we confirm that a passenger has died as a result of the incident,” Viking Polaris said, noting that he had notified the victim’s family and expressed his “deepest condolences.”

Four other tourists “suffered non-life-threatening injuries” and were treated on board, the company said.

Speaking to WRAL-TV, Susie Gooding, a passenger on the cruise, said the wave’s impact was so “shocking” that passengers wondered if they had hit an “iceberg”.

“Everything was fine until a killer wave hit us and it happened all of a sudden,” Gooding said, adding that no one knew if “equipment needed to be prepared in order to leave the ship.”

Viking Polaris said it was “investigating facts related to this incident.”

Read also: Madeira is recognized as the “Best Cruise Destination in Europe”.

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At least 90% of the world’s population has become immune to Covid, according to WHO.

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BUT The assessment was announced by WHO Director-General Tedros Adhanom Ghebreyesus at a video press conference.

However, Ghebreyesus warned that “gaps in surveillance, testing, sequencing” of the genetics of the coronavirus that causes Covid-19 and “in vaccination continue to create ideal conditions for the emergence of a worrying new variant that could cause significant mortality.”

The world-dominant SARS-CoV-2 coronavirus variant of concern to Omicron has more than 500 subvariants, all highly contagious and with genetic mutations that make it easier to overcome immune barriers without causing serious disease. WHO.

In total, the covid-19 pandemic has caused 6.6 million deaths globally and about 640 million infections, according to notifications made by countries to the WHO, which noted that the real number is much higher given cases have not always been communicated.

More than 8,500 deaths from covid-19 have been reported in the past week, a number that the WHO director-general deemed “unacceptable after three years of a pandemic” because there are “tools to prevent infections and save lives.” .

Covid-19 is a respiratory disease caused by SARS-CoV-2, discovered in 2019 in China and rapidly spreading around the world, with several variants and sub-variants.

Read also: COVID-19. Azores with 63 new cases in the last week

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Villarrica already has a large lava lake and high seismic activity.

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The Villarrica volcano in La Araucanía, Chile, one of the largest in the world, showed signs of an impending eruption last Thursday, and experts recorded a “greater intensity and height of incandescence” that ranged from 80 to 220 meters above sea level. its crater – a few days ago we managed to fly over the volcano and a large lava lake was recorded, the temperature of which reached 1043 degrees. High seismic activity has also been noted. Chile’s National Geological and Mining Service (Sernageomin) has already issued a yellow alert.

In any case, the experts of the Chilean government spoke in detail about the possibility of an eruption. According to Sernageomina, “small explosions are expected inside the crater, the impact of which is limited to an area close to the crater of the volcano.”

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