We also identified two independent cases of infection by a Delta-Omicron recombinant virus, where 100% of the viral RNA came from one clonal recombinant.
In both cases, the 5′-end of the viral genome was from the Delta genome, and the 3′-end from Omicron, though the breakpoints were different.
Delta-Omicron recombinant viruses were rare, and there is currently no evidence that the two Delta-Omicron recombinant viruses identified are more transmissible between hosts compared to the circulating Omicron lineages.
Curious about Delta-Omicron recombinants?
Co-circultation of both variants
20 samples with co-infections
Evidence of a few recombinations in co-infections
& 2 infections with 100% recombinant
Details in 🧵
— Alexandre Bolze (@alexbolze) March 13, 2022
So what is a recombinant variant?
According to Swedish virologist, Anders Sönnerborg, “It can be described as two virus strains having sex with each other. They enter a cell and multiply there at the same time. Then they exchange parts of their genes with each other”
Dagens Nyheter (in Swedish)