Why was Florence concerned with sanitary constitutions for soldiers

In 1954, under the authorization of Sidney Herbert, the Secretary of War, Florence Nightingale brought a team of 38 volunteer nurses to care for the British soldiers fighting in the Crimean War, which was intended to limit Russian expansion into Europe.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.