These studies offer a basis for the comparison of epidemics. In 1941 in Maryland 68 per cent. of the patients recovered and 14 per cent. more have a slight residual weakness. Only 2 per cent. have complete disability. The treatment was protective care and physical therapy for weak muscles. There was no complete immobilization of the patient or of extremities.
The patients who do not recover rapidly or spontaneously need prolonged treatment in an effort to bring the weak muscles to their maximum power.
Muscles do not improve in direct ratio to the degree of initial weakness, and may continue to improve for eighteen months in those cases treated immediately after the onset of the poliomyelitis. Patients seen later may improve for a period up to nine months.