Kondo wrote:kravare pa ti si veci pickopacenik od pinka, on je barem duhovit
Djes vido duhovitog pickopacenika? Svi smo pateticni
Kondo wrote:kravare pa ti si veci pickopacenik od pinka, on je barem duhovit
Sotir wrote:Ово што су покушали у Британији, правимо се као да га нема, (а ризичне ко ј...) .Cowboy wrote:
@Sotir : kako mislis lak nacin?
Kondo wrote:9 zarazenih lekara u zagrebu.
jel srbija ima civilnu zastitu (ne mislim da levijatan i patrole)? vidim da hrvati i bosanci imaju i da su uveliko aktivirani.
Santino wrote:Sotir wrote:Болести и ратови не иду заједно.
Глад, криза, беспарица - све то се лепо слаже.
Болест, не.
tri reci: bronze age collapse.
Samo da spomenem Minja je po struci dr mozda se vec angazovala, red jeCowboy wrote:Kondo wrote:kravare pa ti si veci pickopacenik od pinka, on je barem duhovit
Djes vido duhovitog pickopacenika? Svi smo pateticni
Срби у Италији... pic.twitter.com/qqFRr6vGFw
— Драгана Малограџанка (@tosamjabolan) March 17, 2020
Летећи Полип wrote:Sa slušam ovog Nestorovića. Ništa sporno čovek ne priča. Neretko mu se omakne nešto što ne zvuči dobro po vlast, pa voditelj mora da ga ispravi.
The novel SARS-CoV-2 coronavirus that emerged in the city of Wuhan, China, last year and has since caused a large scale COVID-19 epidemic and spread to more than 70 other countries is the product of natural evolution, according to findings published today in the journal Nature Medicine.
The analysis of public genome sequence data from SARS-CoV-2 and related viruses found no evidence that the virus was made in a laboratory or otherwise engineered.
"By comparing the available genome sequence data for known coronavirus strains, we can firmly determine that SARS-CoV-2 originated through natural processes," said Kristian Andersen, PhD, an associate professor of immunology and microbiology at Scripps Research and corresponding author on the paper.
The scientists analyzed the genetic template for spike proteins, armatures on the outside of the virus that it uses to grab and penetrate the outer walls of human and animal cells. More specifically, they focused on two important features of the spike protein: the receptor-binding domain (RBD), a kind of grappling hook that grips onto host cells, and the cleavage site, a molecular can opener that allows the virus to crack open and enter host cells.
The scientists found that the RBD portion of the SARS-CoV-2 spike proteins had evolved to effectively target a molecular feature on the outside of human cells called ACE2, a receptor involved in regulating blood pressure. The SARS-CoV-2 spike protein was so effective at binding the human cells, in fact, that the scientists concluded it was the result of natural selection and not the product of genetic engineering.
This evidence for natural evolution was supported by data on SARS-CoV-2's backbone -- its overall molecular structure. If someone were seeking to engineer a new coronavirus as a pathogen, they would have constructed it from the backbone of a virus known to cause illness. But the scientists found that the SARS-CoV-2 backbone differed substantially from those of already known coronaviruses and mostly resembled related viruses found in bats and pangolins.
"These two features of the virus, the mutations in the RBD portion of the spike protein and its distinct backbone, rules out laboratory manipulation as a potential origin for SARS-CoV-2" said Andersen.