re: Three more studies show negative vaccine efficacy.

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When will health authorities face up to what the data is telling us?

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Because the data is not saying what that blogger is claiming. As I learned long ago, always go to the source and don't listen to people's "interpretation." So I read the study. Lo and behold, the paper itself addresses the "negative" vaccine efficacy:

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The negative estimates in the final period arguably suggest different behaviour and/or exposure patterns in the vaccinated and unvaccinated cohorts causing underestimation of the VE. This was likely the result of Omicron spreading rapidly initially through single (super-spreading) events causing many infections among young, vaccinated individuals.

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The authors conclude the negative efficacy is an artifact and an "underestimation of vaccine efficacy" (their words).

Below they make mention of a British study which corroborates their study. The British study found that boosting brought the VE back up to about 75%:

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A recent study from England (in preprint) found higher effectiveness against symptomatic Omicron initially after BNT162b2 vaccination followed by a rapid decline in protection, and that VE increased to 75.5% (56.1 to 86.3%) two weeks after booster vaccination using unvaccinated individuals as comparison.

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They conclude:

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Our study contributes to emerging evidence that BNT162b2 or mRNA-1273 primary vaccine protection against Omicron decreases quickly over time with booster vaccination offering a significant increase in protection. In light of the exponential rise in Omicron cases, these findings highlight the need for massive rollout of vaccinations and booster vaccinations.

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There you have it from the horse's mouth. The authors of the study the skeptics cite are not saying what the skeptics claim they're saying. The study authors themselves are saying more people need to get vaxxed and boosted.

(By the way, I am not arguing for or against the boost. I am just pointing out that you should not listen to bloggers without checking the primary source yourself).