By morbilli are understood those which the common people style fersae, so-called perhaps from fervor.
morbilli is a mild disease, but requires protection from cold, which confines and coagulates the peccant matter.
It can hardly be doubted that we owe the English name of measles as the equivalent of morbilli to John of Gaddesden.
But the passage quoted is of interest as using the old word mesles to mean one of the two forms of morbilli or punctilli.
It is of two kinds:—varioli, ye measils; morbilli, called of us ye smal pocks.
morbilli mor·bil·li (môr-bĭl'ī)