If this feels like déjà vu, it should.
“This is a radical change of the virus like what happened with omicron, which caught a lot of people defenseless,” said Eric Topol, director of the Scripps Research Translational Institute. “Even if they had a vaccine or prior infection, it could still get into them and infect them again or for the first time. We are facing that again.”
On Aug. 12, virologists in Israel were the first to announce that BA.2.86 had been detected in a patient. Scientists in Denmark, Britain, South Africa, Switzerland and Thailand soon followed. Some of the samples were collected in late July. The sporadic reports add up to evidence of international transmission, but the magnitude is unclear.
Areas where BA.2.86 have been detected have not seen disproportionate increases in hospitalizations, the CDC said, suggesting it’s not more likely to cause more severe illness than other omicron subvariants. The rise of BA.2.86 has raised concerns about declining visibility into the evolution of the virus. Genetic sequencing is necessary to track variants but these efforts have been pared back globally. GISAID, a global data sharing initiative for the coronavirus, has seen specimens collected for genetic sequencing plunge from 425,000 in August 2022 to 38,000 last month.
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