Since the time of the COVID-19 pandemic, there have been many different trials and studies performed on the different vaccines that have been produced to fight the disease. As a requirement, the FDA requires all vaccines to go through a clinical trial which will inevitably require some sort of hypothesis test and/or confidence interval. Assuming all of those trials and studies used a significance level of 0.05, can we expect 5% of those studies to be wrong or are there more/less studies that we can expect to be wrong? Or do we need more information to make this conclusion and if so, what information would we need?