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Dr. Arinjay Banerjee Profile picture
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25 Dec, 4 tweets, 3 min read
I have received questions about how #viruses (eg. #SARSCoV2) jump species to move from animals (eg. bats) into humans. While it may seem like a simple process, a multitude of factors have to align to allow a #virus to successfully cross the species barrier.
A THREAD...
. @rainamontana's review from 2017 is a great explainer of the complexity of this process: nature.com/articles/nrmic…
Several factors (represented in this figure by holes) have to align to enable a virus to jump species.
As far as #SARSCoV2 is concerned, while data supports a bat origin for the virus, the transmission route of the virus (how did the virus makes its way from bats into humans?) remains unknown. For a scientific explanation, read our forum article here: cell.com/trends/ecology…
END THREAD.

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Dr. Arinjay Banerjee Profile picture
20 Dec
The mutation in the spike protein of circulating #SARSCoV2 has been the focus of many stories over the last couple of days. We and others have shown that coronaviruses exist as mixed populations (quasispecies) in a host.. here’s what we know.
A THREAD..
#mutantcovid
We showed that MERSCoV can select for different variants in cells from an alternate host (I.e. bats): nature.com/articles/s4159…
So, what we realized is that the virus itself doesn’t actively change, but the major represented population does, based on selection pressure. So what does that mean?...
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