> which was that variant-specific vaccines for Delta and Omicron were tried, found less effective than the the existing vaccines, and abandoned
> It turned out that the original vaccine is as effective for Delta, so that work was shelved. Omicron, on the other hand, seems to be evading the immunity created by the Alpha vaccine, so they are actually planning to start producing an Omicron specific booster (or more correctly Alpha+Omicron) after FDA approval.
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The thing he said may not have been strictly accurate but your claim about what he said is much less accurate than that.
> It turned out that the original vaccine is as effective for Delta, so that work was shelved. Omicron, on the other hand, seems to be evading the immunity created by the Alpha vaccine, so they are actually planning to start producing an Omicron specific booster (or more correctly Alpha+Omicron) after FDA approval.
???????????
The thing he said may not have been strictly accurate but your claim about what he said is much less accurate than that.