On February 21, 2022, Frontiers in Virology published a report titled MSH3 Homology and Potential Recombination Link to SARS-CoV-2 Furin Cleavage Site (https://www.frontiersin.org/articles/10.3389/fviro.2022.834808/full).
The Furin Cleavage Site is the component of the SARS-CoV-2 spike protein that enables the virus to dock onto human lung epithelial cells, thereby initiating the viral replication process.
It is the key feature of SARS-CoV-2 that made it infectious to humans.
Examining the genetic code of this part of the spike protein, the authors noted that part of the sequence was a perfect match to a genetic sequence patented in 2016 by Bancel S.
Et al.
In Cambridge, Massachusetts.