=Symptoms of Onset.=—There is no typical onset for this disease. It is believed that there is an interval of from a few days to two weeks between the time of exposure and the appearance of symptoms. No one symptom or group of symptoms will always be found to identify it before the paralysis is apparent. Fever is the most constant of all symptoms; it varies a great deal; there may be much or there may be little. Vomiting occurs quite frequently, and in a child old enough to talk headache may be complained of. Sometimes there is considerable pain in the back. The child is often very drowsy and desires to be alone. Movements of any kind seem to cause pain, and muscle tenderness is plainly evident. Marked irritability and sweating are also often prominent features. Such symptoms may all appear suddenly following a day of great activity and good health. These symptoms may continue for from two to four days, when it is noticed that the child is unable to move a hand, an arm, a foot, or a leg. There may merely be a paralysis of one side of the face or only weakness in an arm or leg. In some mild cases it is occasionally hard to convince parents of the true nature of the disease. In some instances the first knowledge of a child’s indisposition is the discovery that it cannot walk or has difficulty in using an arm. Cases of this character are often attributed to “catching cold,” to going in bathing for too long, or perhaps a fall. In the majority of cases temperature is down to normal within a week and there is seldom an extension of the paralysis after that time. In most instances all the paralysis which is going to occur is present at the time it is first noticed. Within two weeks all the tenderness has usually left the muscles, which are now found to be soft and flabby from lack of use. No matter what extremity may be affected by the paralysis, there is one condition which is nearly always present in these cases. If the child’s shoulders are raised up from the bed, the head drops back almost as if on a string. The child is unable to keep its head in a line with the body, and if the head is raised and forcibly bent forward so as to cause the chin to touch the chest, marked pain results. =Treatment.=—By the end of three weeks in favorable cases there may be some motion obtained by the patient in the limb which was paralyzed, or there may be evidence of threatened deformity. It is at this time and in the weeks and months to follow that so much depends upon treatment. The muscles of a leg or arm may waste away so as to make them useless if not promptly cared for. If contractions of muscles are not prevented, a club-foot, toe-drop, or some similar deformity may develop. _Such deformities may be hastened by the pressure of the bed-clothes._ At times it is well to put a wire cradle over the affected limbs. Well-padded splints seem to take the strain from unaffected muscles.