In this thread @EricTopol describes evidence from Israel of waning anti-#SARSCoV2 immunity months after mRNA #COVID19 #vaccination.
But as I wrote https://t.co/NZk0v3r6Dc the explanation is about timing. People ARE immune, but after months response goes
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Breaking—UK scientists just reported a case-control study that the mutated UK 🇬🇧B.1.1.7 variant is not associated w/ more severe #COVID19— “found no significant differences in hospital admissions and case fatality at 28 days, & occurrence of reinfections”, says @mvankerkhove
2) That said, the new UK mutated strain is a more transmissible (contagious) variant. Keep transmissibility and illness severity separate. They are two different things. Don’t get them confused.
3) The new UK variant severity study is included in today’s WHO report, to be released soon this afternoon according to WHO sources. Waiting for it to drop. I’ll keep folks posted on the details.
4) Update: here is UK Technical report on #SARSCoV2 variant of concern (B.1.1.7) in 🇬🇧 with prelim findings from their case-control study of no increased severity for the new variant that I reported yesterday.
5) Also keep in a mind that a virus that spreads faster (more contagious) yields much worse total outcomes than a virus that is just merely more severe.
All things equal, a new mutated variant that is more contagious & no more severe is worse. And that is what we now have.
2) That said, the new UK mutated strain is a more transmissible (contagious) variant. Keep transmissibility and illness severity separate. They are two different things. Don’t get them confused.
3) The new UK variant severity study is included in today’s WHO report, to be released soon this afternoon according to WHO sources. Waiting for it to drop. I’ll keep folks posted on the details.
4) Update: here is UK Technical report on #SARSCoV2 variant of concern (B.1.1.7) in 🇬🇧 with prelim findings from their case-control study of no increased severity for the new variant that I reported yesterday.
5) Also keep in a mind that a virus that spreads faster (more contagious) yields much worse total outcomes than a virus that is just merely more severe.
All things equal, a new mutated variant that is more contagious & no more severe is worse. And that is what we now have.
Why a SARS-CoV-2 variant that's 50% more transmissible would in general be a much bigger problem than a variant that's 50% more deadly. A short thread... 1/
— Adam Kucharski (@AdamJKucharski) December 28, 2020
A teachable moment for Bayesian reasoning – when one study finds a result that's massively different than all the others, and, moreover, conflicts with what we know about the science, there's a pretty good chance it's either a fluke or it's wrong.
The Israeli estimate of relatively high immune escape from Delta that a lot of you were freaking out about now looks like it was the result of sloppy statistical analysis. https://t.co/F5sHsJDFF1
— Nate Silver (@NateSilver538) July 28, 2021
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Viruses and other pathogens are often studied as stand-alone entities, despite that, in nature, they mostly live in multispecies associations called biofilms—both externally and within the host.
https://t.co/FBfXhUrH5d
Microorganisms in biofilms are enclosed by an extracellular matrix that confers protection and improves survival. Previous studies have shown that viruses can secondarily colonize preexisting biofilms, and viral biofilms have also been described.
...we raise the perspective that CoVs can persistently infect bats due to their association with biofilm structures. This phenomenon potentially provides an optimal environment for nonpathogenic & well-adapted viruses to interact with the host, as well as for viral recombination.
Biofilms can also enhance virion viability in extracellular environments, such as on fomites and in aquatic sediments, allowing viral persistence and dissemination.
Viruses and other pathogens are often studied as stand-alone entities, despite that, in nature, they mostly live in multispecies associations called biofilms—both externally and within the host.
https://t.co/FBfXhUrH5d
Microorganisms in biofilms are enclosed by an extracellular matrix that confers protection and improves survival. Previous studies have shown that viruses can secondarily colonize preexisting biofilms, and viral biofilms have also been described.
...we raise the perspective that CoVs can persistently infect bats due to their association with biofilm structures. This phenomenon potentially provides an optimal environment for nonpathogenic & well-adapted viruses to interact with the host, as well as for viral recombination.
Biofilms can also enhance virion viability in extracellular environments, such as on fomites and in aquatic sediments, allowing viral persistence and dissemination.