pustule

Although smallpox was a widespread and frightening disease, many resisted variolation, which meant inserting material from a smallpox sufferer’s pustules into a healthy person’s skin.

Later, rashes develop on the face and body which turn into lesions, pustules, and eventually scabs.

The pustule on the fore finger shews the disease in an earlier stage.

Little white specks appear upon the wool, and are soon followed by a small pustule at the root.

As well might you account for the smallpox by saying that the first pustule was the cause of the disease.

pustule, pus′tūl, n. a small pimple containing pus: anything like a pustule, on plants or animals: a small blister.

It attacked the horse and cow as well as the sheep, and human beings died of it when they developed malignant pustule.