The Cleveland Clinic Study:
The association of increased risk of COVID-19 with higher numbers of prior vaccine doses in our study, was unexpected. A simplistic explanation might be that those who received more doses were more likely to be individuals at higher risk of COVID-19. A small proportion of individuals may have fit this description. However, the majority of subjects in this study were generally young individuals and all were eligible to have received at least 3 doses of vaccine by the study start date, and which they had every opportunity to do. … This is not the only study to find a possible association with more prior vaccine doses and higher risk of COVID-19. … We still have a lot to learn about protection from COVID-19 vaccination, and in addition to a vaccine’s effectiveness it is important to examine whether multiple vaccine doses given over time may not be having the beneficial effect that is generally assumed.
The CC study also found the latest versions to only have a 30% efficacy rate.
As a side note. I suggest everyone use Xlear nasal spray, not only is it a non drug based nasal decongestant that works well. Their own in-house studies claim that it prevents the the Covid virus from replicating in the upper respiratory system. The government sued them on these claims, which is what our government does, which is fine, you know, public watchdog and all that stuff. But what's not fine is the government then tried to compel the courts to not allow Xlear to respond. Which the courts thankfully denied.
What's fascinating, is that our government is running around demanding exhaustive random clinical trials on any method that claims to prevent or inhibit Covid . . . but is not requiring the same of it's most favored vaccine providers.