Regarding “Has Personalized Medicine Been a Wrong Turn?” (Review, May 9): Public health is not the same as practicing medicine. One is dedicated to the prevention of disease and the other to its treatment. A physician doesn’t choose a treatment because it’s best for the population. Instead the physician’s responsibility is to take all of the data available and apply it to the individual patient. It is a mistake to assume every patient will have the same outcome with the same therapy, just as it is a mistake to assume all disease should be preventable.

Source: Wall Street Journal May 17, 2020 20:15 UTC