I haven't looked at the study but there's nothing implausible-sounding about the results. Mid-July was before the plummet in infection efficacy; so the pseudo-vaccines were playing on easy mode - in fact, they probably had a lot of false positives for cases based on cases being rarer. And severe outcomes efficacy still looks strong in England and looked strong in Israel before the booster craziness. And, relative risk multipliers are great at portraying any change to a low absolute risk as a meteoric impact.

Most US states still seem to just be tipping into where Israel was at the beginning of July. That's when double-dosed started to dominate the hospital in absolute numbers, even though the severe outcome efficacy was solid.

Though, if our hospitals are venting up patients early on purpose, that will skew all the rates (middle-aged and younger patients, who are less vaccinated, will die more than otherwise).