Bayes Theorem, Vaccination and Media mis-interpretations
Recently I read an article in a reputed magazine discussing the resurgence of COVID in Israel, a country that had vaccinated a major fraction of its population. The article mentioned that 50% of the new COVID cases comprised of individuals who were already vaccinated. Subsequently, it raised the question of the effectiveness of the vaccine. But on second thought, it is not just about this article or Israel but such argumentations take place on day to day basis and across countries. Frankly speaking, I won't blame individuals for misunderstanding is due to the nuances involved. However, I have better expectations from journalists. Anyways, the situation, as is discussed, actually does not provide any evidence to dilute vaccine effectiveness. Instead, it's a result of misinterpretation arising due to lacking understanding of the Bayes Theorem. To know more, look at the math: So I hope the math gave you some idea about what I am talking about. Presently, there exists cross-sectio