This 50% thing is really a stupid fuss from the English MSM. And I do think Brazil's government released the data point with an evil mind. Quite simply to me and my family, if a medicine has 100% efficacy of preventing me from being hospitalized, and 78% efficacy of preventing me from taking 10 PTO days, then I won't hesitate taking it right here right now, even with 100% chance of having mild symptoms. Heck! I have mild to strong symptoms every allergy season each year. mRNA is a new and unproven approach. Given potential harms, I would take CoronaVac over mRNA any hour on any day in any week. Period. Really stupid English craps.
The government of Brazil correctly reported the data by the stage of disease intensity, in addition to an average effectiveness. The problem is how each one wanted to interpret. If the Western media wanted to take the lowest value as a reference and you wanted to take the highest value, it is not the fault of the research. For example, a few days ago China released data on GDP. The headlines of the same media pointed out that it was the lowest value in 40 years, not as the only major country to present a positive result. Understood?