<P> Scarlet fever serum was used beginning in November 1900 after its development in the Sero - Therapeutic Laboratory of Rudolph Hospital in Vienna, Austria . The serum was taken from the blood of horses . Infected children were injected in their abdominal skin by Dr. Paul Moser . Mortality rates from scarlet fever declined significantly following the use of the blood serum . </P> <P> Moser at first used scarlet fever serum primarily on the most severely sick persons . After achieving positive results it was applied in the first or second day following contraction of scarlet fever . In many cases the children treated demonstrated great improvement in a very short time, with their fevers going away quickly . Moser worked with four hundred children suffering from scarlatina at St. Anne's Hospital . The mortality rate of those he treated was 8.9% . This compared quite favorably when measured against the 13.09% among children in Vienna hospitals where the scarlet fever serum was not administered . Moser's antitoxin reduced the mortality of scarlet fever by 40% . </P>

When was the cure for scarlet fever discovered