Did you know recent research from the Czech Republic is shaking up what we thought about Covid vaccine effectiveness? Turns out, a bunch of studies might have overestimated how well the shots work because of something called the 'healthy vaccinee effect.' Some experts are now saying the real impact could be way less—or even negative. The big question: Why haven’t we seen large, randomized trials to settle this once and for all? Feels like we deserve the full story, right? #Health #BodyHealth #CovidVaccine