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Keep in mind that the vaccines were never actually intended for monkeypox. It's just characteristic of the relative closeness of orthopoxviruses that a smallpox vaccine has an efficacy profile against monkeypox.

And neither ACAM2000 nor Jynneos are routinely administered even in Africa. So even prior to this current outbreak there's a whole lot of uncertainty about their actual efficacy against monkeypox.

The 85% efficacy figure is really more of a "best guess" given that the actual target pathogen, smallpox, is no longer endemic anywhere in the world.

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Excellent, thank you for explaining

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