Our fall COVID boosters will likely be a monovalent XBB formula

If all goes smoothly, the FDA is expecting new shots around September.

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So a monovalent booster should not wane in effectiveness as the bivalent?
- I think it's just that the bivalent booster was targeting (a) an extinct variant and (b) a different Omicron subvariant. This will target some form of Omicron XBB, I think, which has been the dominant strain for months now.