Information has been received from a medical assistant concerning a 40 year old female patient who on 18-JUN-2010 was vaccinated subcutaneously with the first 0.5ml dose of MMR II (Lot # 665797/1334Y, Expiration date 17-SEP-2011). The medical assistant reported that on 18-JUN-2010 the patient's titers were drawn and the patient was found to have low titers to the mumps components of the vaccine. On 16-JUL-2010 a second dose of MMR II was given. On an unspecified date, titers drawn again with the same result. No adverse effects known. Follow-up information was received, which reported that the female patient with hay fever "non known to medications" was vaccinated with a dose of MMR II (Lot # 665797/1334Y), Left deltoid on 16-JUL-2010. The patient stated that several days after receiving the shot, her left leg went numb. Another odd symptom that lasted only one week was that she would feel like the skin over my kneecap had popped open and water was running down her knee; but she claimed that it was only a neurological illusion. The water sensation happened only when she squatted down, and flexed her quadricep, to pick up her dog each night and carry him to bed. She began to have further neurological reactions to the vaccine where administered. The patient would feel like someone was pinching her leg on and off all day long. The patient reported that physical activity, such as briskly walking across campus or squatting down to pick up a heavy object, seemed to aggravate it, when the muscles were being flexed or worked. At another times, she would feel pins and needles up and down her leg. At night, when she first went to bed, she would feel electrical impulses moving back and forth across her left quadricep. The range of her body affected was the upper left leg, from the kneecap to her hip. As this was healing, her leg would also get very itchy at times, but she mentioned that scabs could do this when the body is healing. So it actually encouraged her that the symptoms seemed to be healing on an internal level. The patient stated that she did a titer in an attempt to prove immunity which was low mumps reading. The patient's doctor told her that there exists a percentage of the population who will never have a high titer reading, no matter how many injections they receive, her doctor believes that the patient was in this category of the population and had recommended that the patient did not get any more MMR II, also based on the strong negative reaction that the patient's body had experienced. The patient claimed that since July 2010 the patient occasionally felt the symptoms, the patient stated that she assists a yoga-type stretch that she does every morning that made her squat and then sit back on her legs. Every time that she did this, only  my upper left leg would be numb for one minute afterwards (and this never happened prior to the vaccination). Once in a while, she would still feel electrical impulses jumping across her leg in the evening when she went to bed. At other times, she would feel like part of her leg was drooping or when she was wearing trousers, it would feel odd because she would feel most of her clothing, but not all of it. However, she would estimate a 90-95% recovery at the time of the report. The patient did not seek medical attention. Additional information has been requested.