As measles is the most prevalent of the diseases of infancy and early childhood, and also
predisposes to a complicating bronchial pneumonia, it is one of the two most fatal of the
communicable diseases of early childhood, and its prevention has been eagerly sought by
clinical and laboratory investigators. The ideal in their mind is to discover the germ and
prepare a vaccine such as we have against diphtheria, tetanus and scarlet fever. Tunnicliff in
the United States and Caronia in Italy have reported such discoveries. Their work is now …